diff --git a/vendor/git.rootprojects.org/root/vfscopy/.gitignore b/vendor/git.rootprojects.org/root/vfscopy/.gitignore
new file mode 100644
index 0000000..a17d54a
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/.gitignore
@@ -0,0 +1,3 @@
+*_vfsdata.go
+.*.sw*
+.DS_Store
diff --git a/vendor/git.rootprojects.org/root/vfscopy/AUTHORS b/vendor/git.rootprojects.org/root/vfscopy/AUTHORS
new file mode 100644
index 0000000..12d2230
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/AUTHORS
@@ -0,0 +1 @@
+AJ ONeal <aj@therootcompany.com> (https://therootcompany.com)
diff --git a/vendor/git.rootprojects.org/root/vfscopy/LICENSE b/vendor/git.rootprojects.org/root/vfscopy/LICENSE
new file mode 100644
index 0000000..3b5d66b
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2020 The vfscopy Authors
+Copyright (c) 2018 otiai10
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/vendor/git.rootprojects.org/root/vfscopy/README.md b/vendor/git.rootprojects.org/root/vfscopy/README.md
new file mode 100644
index 0000000..1525fdd
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/README.md
@@ -0,0 +1,63 @@
+# [vfscopy](https://git.rootprojects.org/root/vfscopy)
+
+Recursively copy a Virtual FileSystem, such as
+[http.FileSystem](https://golang.org/pkg/net/http/#FileSystem),
+to a native file system destination.
+
+Works with any file system that implements http.FileSystem,
+including `vfsgen`, `fileb0x`, `gobindata` and most others.
+
+## Example: native file system (os)
+
+```go
+httpfs := http.Dir("/tmp/public/")
+vfs := vfscopy.NewVFS(httpfs)
+
+if err := vfscopy.CopyAll(vfs, ".", "/tmp/dst/"); nil != err {
+    fmt.Fprintf(os.Stderr, "couldn't copy vfs: %v\n", err)
+}
+```
+
+## Example: vfsgen
+
+**Note**: `vfsgen` does not support symlinks or file permissions.
+
+```go
+package main
+
+import (
+    "fmt"
+
+    "git.rootprojects.org/root/vfscopy"
+
+    // vfsgen-generated file system
+    "git.example.com/org/project/assets"
+)
+
+func main() {
+    vfs := vfscopy.NewVFS(assets.Assets)
+
+    if err := vfscopy.CopyAll(vfs, ".", "/tmp/dst/"); nil != err {
+        fmt.Fprintf(os.Stderr, "couldn't copy vfs: %v\n", err)
+    }
+    fmt.Println("Done.")
+}
+```
+
+## Test
+
+```bash
+# Generate the test virtual file system
+go generate ./...
+
+# Run the tests
+go test ./...
+```
+
+# License
+
+The MIT License (MIT)
+
+We used the recursive native file system copy implementation at
+https://github.com/otiai10/copy as a starting point and added
+virtual file system support.
diff --git a/vendor/git.rootprojects.org/root/vfscopy/copy.go b/vendor/git.rootprojects.org/root/vfscopy/copy.go
new file mode 100644
index 0000000..d40dc7f
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/copy.go
@@ -0,0 +1,209 @@
+package vfscopy
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+)
+
+const (
+	// tmpPermissionForDirectory makes the destination directory writable,
+	// so that stuff can be copied recursively even if any original directory is NOT writable.
+	// See https://github.com/otiai10/copy/pull/9 for more information.
+	tmpPermissionForDirectory = os.FileMode(0755)
+)
+
+// CopyAll copies src to dest, doesn't matter if src is a directory or a file.
+func CopyAll(vfs FileSystem, src, dest string, opt ...Options) error {
+	// FYI: os.Open does a proper lstat
+	f, err := vfs.Open(src)
+	if err != nil {
+		return err
+	}
+	info, err := f.Stat()
+	if err != nil {
+		return err
+	}
+	return switchboard(vfs, src, dest, f, info, assure(opt...))
+}
+
+// switchboard switches proper copy functions regarding file type, etc...
+// If there would be anything else here, add a case to this switchboard.
+func switchboard(
+	vfs FileSystem, src, dest string, f File, info os.FileInfo, opt Options,
+) error {
+	switch {
+	case info.Mode()&os.ModeSymlink != 0:
+		// TODO
+		return onsymlink(vfs, src, dest, opt)
+	case info.IsDir():
+		return dcopy(vfs, src, dest, f, info, opt)
+	default:
+		return fcopy(vfs, src, dest, f, info, opt)
+	}
+}
+
+// copy decide if this src should be copied or not.
+// Because this "copy" could be called recursively,
+// "info" MUST be given here, NOT nil.
+func copy(vfs FileSystem, src, dest string, f File, info os.FileInfo, opt Options) error {
+	skip, err := opt.Skip(src)
+	if err != nil {
+		return err
+	}
+	if skip {
+		return nil
+	}
+	return switchboard(vfs, src, dest, f, info, opt)
+}
+
+// fcopy is for just a file,
+// with considering existence of parent directory
+// and file permission.
+func fcopy(vfs FileSystem, src, dest string, f File, info os.FileInfo, opt Options) (err error) {
+
+	if err = os.MkdirAll(filepath.Dir(dest), os.ModePerm); err != nil {
+		return
+	}
+
+	df, err := os.Create(dest)
+	if err != nil {
+		return
+	}
+	defer fclose(df, &err)
+
+	if err = os.Chmod(df.Name(), info.Mode()|opt.AddPermission); err != nil {
+		return
+	}
+
+	s, err := vfs.Open(src)
+	if err != nil {
+		return
+	}
+	defer fclose(s, &err)
+
+	if _, err = io.Copy(df, s); err != nil {
+		return
+	}
+
+	if opt.Sync {
+		err = df.Sync()
+	}
+
+	return
+}
+
+// dcopy is for a directory,
+// with scanning contents inside the directory
+// and pass everything to "copy" recursively.
+func dcopy(vfs FileSystem, srcdir, destdir string, d File, info os.FileInfo, opt Options) (err error) {
+
+	originalMode := info.Mode()
+
+	// Make dest dir with 0755 so that everything writable.
+	if err = os.MkdirAll(destdir, tmpPermissionForDirectory); err != nil {
+		return
+	}
+	// Recover dir mode with original one.
+	defer chmod(destdir, originalMode|opt.AddPermission, &err)
+
+	fileInfos, err := d.Readdir(-1)
+	if err != nil {
+		return
+	}
+
+	for _, newInfo := range fileInfos {
+		cs, cd := filepath.Join(
+			srcdir, newInfo.Name()),
+			filepath.Join(destdir, newInfo.Name())
+
+		f, err := vfs.Open(cs)
+		if nil != err {
+			return err
+		}
+		if err := copy(vfs, cs, cd, f, newInfo, opt); err != nil {
+			// If any error, exit immediately
+			return err
+		}
+	}
+
+	return
+}
+
+func onsymlink(vfs FileSystem, src, dest string, opt Options) error {
+	switch opt.OnSymlink(src) {
+	case Shallow:
+		return lcopy(vfs, src, dest)
+	/*
+	case Deep:
+		orig, err := vfs.EvalSymlinks(src)
+		if err != nil {
+			return err
+		}
+		f, err := vfs.Open(orig)
+		if err != nil {
+			return err
+		}
+		//info, err := os.Lstat(orig)
+		info, err := f.Stat()
+		if err != nil {
+			return err
+		}
+		return copy(vfs, orig, dest, f, info, opt)
+	*/
+	case Skip:
+		fallthrough
+	default:
+		return nil // do nothing
+	}
+}
+
+// lcopy is for a symlink,
+// with just creating a new symlink by replicating src symlink.
+func lcopy(vfs FileSystem, src, dest string) error {
+	src, err := vfs.Readlink(src)
+	if err != nil {
+		return err
+	}
+
+	// Create the directories on the path to the dest symlink.
+	if err := os.MkdirAll(filepath.Dir(dest), os.ModePerm); err != nil {
+		return err
+	}
+
+	return os.Symlink(src, dest)
+}
+
+// fclose ANYHOW closes file,
+// with asiging error raised during Close,
+// BUT respecting the error already reported.
+func fclose(f File, reported *error) {
+	if err := f.Close(); *reported == nil {
+		*reported = err
+	}
+}
+
+// chmod ANYHOW changes file mode,
+// with asiging error raised during Chmod,
+// BUT respecting the error already reported.
+func chmod(dir string, mode os.FileMode, reported *error) {
+	if err := os.Chmod(dir, mode); *reported == nil {
+		*reported = err
+	}
+}
+
+// assure Options struct, should be called only once.
+// All optional values MUST NOT BE nil/zero after assured.
+func assure(opts ...Options) Options {
+	if len(opts) == 0 {
+		return getDefaultOptions()
+	}
+	defopt := getDefaultOptions()
+	if opts[0].OnSymlink == nil {
+		opts[0].OnSymlink = defopt.OnSymlink
+	}
+	if opts[0].Skip == nil {
+		opts[0].Skip = defopt.Skip
+	}
+	return opts[0]
+}
diff --git a/vendor/git.rootprojects.org/root/vfscopy/go.mod b/vendor/git.rootprojects.org/root/vfscopy/go.mod
new file mode 100644
index 0000000..e0fe6d5
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/go.mod
@@ -0,0 +1,9 @@
+module git.rootprojects.org/root/vfscopy
+
+go 1.15
+
+require (
+	github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749 // indirect
+	github.com/shurcooL/vfsgen v0.0.0-20200824052919-0d455de96546
+	golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 // indirect
+)
diff --git a/vendor/git.rootprojects.org/root/vfscopy/go.sum b/vendor/git.rootprojects.org/root/vfscopy/go.sum
new file mode 100644
index 0000000..d1e5ea0
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/go.sum
@@ -0,0 +1,26 @@
+github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749 h1:bUGsEnyNbVPw06Bs80sCeARAlK8lhwqGyi6UT8ymuGk=
+github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749/go.mod h1:ZY1cvUeJuFPAdZ/B6v7RHavJWZn2YPVFQ1OSXhCGOkg=
+github.com/shurcooL/vfsgen v0.0.0-20200824052919-0d455de96546 h1:pXY9qYc/MP5zdvqWEUH6SjNiu7VhSjuVFTFiTcphaLU=
+github.com/shurcooL/vfsgen v0.0.0-20200824052919-0d455de96546/go.mod h1:TrYk7fJVaAttu97ZZKrO9UbRa8izdowaMIZcxYMbVaw=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6 h1:rbvTkL9AkFts1cgI78+gG6Yu1pwaqX6hjSJAatB78E4=
+golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/vendor/git.rootprojects.org/root/vfscopy/options.go b/vendor/git.rootprojects.org/root/vfscopy/options.go
new file mode 100644
index 0000000..c293907
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/options.go
@@ -0,0 +1,44 @@
+package vfscopy
+
+import "os"
+
+// Options specifies optional actions on copying.
+type Options struct {
+	// OnSymlink can specify what to do on symlink
+	OnSymlink func(src string) SymlinkAction
+	// Skip can specify which files should be skipped
+	Skip func(src string) (bool, error)
+	// AddPermission to every entities,
+	// NO MORE THAN 0777
+	AddPermission os.FileMode
+	// Sync file after copy.
+	// Useful in case when file must be on the disk
+	// (in case crash happens, for example),
+	// at the expense of some performance penalty
+	Sync bool
+}
+
+// SymlinkAction represents what to do on symlink.
+type SymlinkAction int
+
+const (
+	// Shallow creates new symlink to the dest of symlink.
+	Shallow SymlinkAction = iota
+	// Skip does nothing with symlink.
+	Skip 
+)
+
+// getDefaultOptions provides default options,
+// which would be modified by usage-side.
+func getDefaultOptions() Options {
+	return Options{
+		OnSymlink: func(string) SymlinkAction {
+			return Shallow // Do shallow copy
+		},
+		Skip: func(string) (bool, error) {
+			return false, nil // Don't skip
+		},
+		AddPermission: 0,     // Add nothing
+		Sync:          false, // Do not sync
+	}
+}
diff --git a/vendor/git.rootprojects.org/root/vfscopy/vfs.go b/vendor/git.rootprojects.org/root/vfscopy/vfs.go
new file mode 100644
index 0000000..2cc88db
--- /dev/null
+++ b/vendor/git.rootprojects.org/root/vfscopy/vfs.go
@@ -0,0 +1,137 @@
+package vfscopy
+
+import (
+	"os"
+	"io"
+	"io/ioutil"
+	"path/filepath"
+	"path"
+	"strings"
+	"errors"
+	"net/http"
+)
+
+// FileSystem is a Virtual FileSystem with Symlink support
+type FileSystem interface {
+    Open(name string) (File, error)
+	Readlink(name string) (string, error)
+	//EvalSymlinks(name string) (string, error)
+}
+
+// File is copied from http.File
+type File interface {
+    io.Closer
+    io.Reader
+    io.Seeker
+    Readdir(count int) ([]os.FileInfo, error)
+    Stat() (os.FileInfo, error)
+}
+
+// VFS is a virtual FileSystem with Symlink support
+type VFS struct {
+	FileSystem http.FileSystem
+}
+
+// Open opens a file relative to a virtual filesystem
+func (v *VFS) Open(name string) (File, error) {
+	return v.FileSystem.Open(name)
+}
+
+// Readlink returns a "not implemented" error,
+// which is okay because it is never called for http.FileSystem.
+func (v *VFS) Readlink(name string) (string, error) {
+	f, err := v.FileSystem.Open(name)
+	if nil != err {
+		return "", err
+	}
+	b, err := ioutil.ReadAll(f)
+	if nil != err {
+		return "", err
+	}
+	return string(b), nil
+}
+
+// NewVFS gives an http.FileSystem (real) symlink support
+func NewVFS(httpfs http.FileSystem) FileSystem {
+	return &VFS{ FileSystem: httpfs }
+}
+
+// Dir is an implementation of a Virtual FileSystem
+type Dir string
+
+// mapDirOpenError maps the provided non-nil error from opening name
+// to a possibly better non-nil error. In particular, it turns OS-specific errors
+// about opening files in non-directories into os.ErrNotExist. See Issue 18984.
+func mapDirOpenError(originalErr error, name string) error {
+	if os.IsNotExist(originalErr) || os.IsPermission(originalErr) {
+		return originalErr
+	}
+
+	parts := strings.Split(name, string(filepath.Separator))
+	for i := range parts {
+		if parts[i] == "" {
+			continue
+		}
+		fi, err := os.Stat(strings.Join(parts[:i+1], string(filepath.Separator)))
+		if err != nil {
+			return originalErr
+		}
+		if !fi.IsDir() {
+			return os.ErrNotExist
+		}
+	}
+	return originalErr
+}
+
+func (d Dir) fullName(name string) (string, error) {
+	if filepath.Separator != '/' && strings.ContainsRune(name, filepath.Separator) {
+		return "", errors.New("http: invalid character in file path")
+	}
+	dir := string(d)
+	if dir == "" {
+		dir = "."
+	}
+	fullName := filepath.Join(dir, filepath.FromSlash(path.Clean("/"+name)))
+	return fullName, nil
+}
+
+// Open opens a file relative to a virtual filesystem
+func (d Dir) Open(name string) (File, error) {
+	fullName, err := d.fullName(name)
+	if nil != err {
+		return nil, err
+	}
+	f, err := os.Open(fullName)
+	if err != nil {
+		return nil, mapDirOpenError(err, fullName)
+	}
+	return f, nil
+}
+
+// Readlink returns the destination of the named symbolic link.
+func (d Dir) Readlink(name string) (string, error) {
+	name, err := d.fullName(name)
+	if nil != err {
+		return "", err
+	}
+	name, err = os.Readlink(name)
+	if err != nil {
+		return "", mapDirOpenError(err, name)
+	}
+	return name, nil
+}
+
+/*
+// EvalSymlinks returns the destination of the named symbolic link.
+func (d Dir) EvalSymlinks(name string) (string, error) {
+	name, err := d.fullName(name)
+	if nil != err {
+		return "", err
+	}
+	name, err = filepath.EvalSymlinks(name)
+	if err != nil {
+		return "", mapDirOpenError(err, name)
+	}
+	return name, nil
+}
+*/