Update prefix format

README.md

@@ -111,7 +111,7 @@ The options are:
 
   Be sure to include any additional files you would like deployed like images, videos, font files, etc.
 
-  You can use relative paths which break out of the `root`.  If you prefix the path with `/`, it will be interpreted as relative to the project directory, not the `root`.
+  You can use relative paths which break out of the `root`.  If you prefix the path with `-/`, it will be interpreted as relative to the project directory, not the `root`.
 
 ##### `env`
   The config file can contain configurations for multiple environments (production, staging, etc.).  This specifies which is used.  See the "YAML Config" section for more information.

src/deploy.go

@@ -370,8 +370,8 @@ func expandFiles(root string, glob string) []string {
 	cases := strings.Split(glob, ",")
 
 	for _, pattern := range cases {
-		if strings.HasPrefix(pattern, "/") {
-			pattern = pattern[1:]
+		if strings.HasPrefix(pattern, "-/") {
+			pattern = pattern[2:]
 		} else {
 			pattern = filepath.Join(root, pattern)
 		}