Update documentation

README.md

@@ -146,9 +146,9 @@ type based on filename extension.:
 
   - `path` - the file path.
   - `options` - optional settings:
-      - `baseDir` - serve file relative to this directory and returns `403 Forbidden` if the
-        `path` resolves outside the `baseDir`.
-        Defaults to `true` which uses the `relativeTo` route option as the `baseDir`.
+      - `confine` - serve file relative to this directory and returns `403 Forbidden` if the
+        `path` resolves outside the `confine` directory.
+        Defaults to `true` which uses the `relativeTo` route option as the `confine`.
         Set to `false` to disable this security feature.
       - `filename` - an optional filename to specify if sending a 'Content-Disposition' header,
         defaults to the basename of `path`
@@ -182,9 +182,9 @@ Generates a static file endpoint for serving a single file. `file` can be set to
     file path.
   - an object with one or more of the following options:
       - `path` - a path string or function as described above (required).
-      - `baseDir` - serve file relative to this directory and returns `403 Forbidden` if the
-        `path` resolves outside the `baseDir`.
-        Defaults to `true` which uses the `relativeTo` route option as the `baseDir`.
+      - `confine` - serve file relative to this directory and returns `403 Forbidden` if the
+        `path` resolves outside the `confine` directory.
+        Defaults to `true` which uses the `relativeTo` route option as the `confine`.
         Set to `false` to disable this security feature.
       - `filename` - an optional filename to specify if sending a 'Content-Disposition'
         header, defaults to the basename of `path`