readme: Document using file_server for GETs (#25)

* Document how to server WebDAV and directory listing under same path.

Thanks for help from @wader, @Zeethulhu and @noerw.

* Commit suggested change

#25 (comment)

Co-authored-by: Matt Holt <[email protected]>

* get, or not get

Co-authored-by: Matt Holt <[email protected]>

README.md

@@ -38,11 +38,7 @@ route {
 }
 ```
 
-The `prefix` directive is optional but has to be used if a webdav share is used in
-combination with matchers or path manipulations. This is because webdav uses
-absolute paths in its response. There exist a similar issue when using reverse
-proxies, see
-[The "subfolder problem", OR, "why can't I reverse proxy my app into a subfolder?"](https://caddy.community/t/the-subfolder-problem-or-why-cant-i-reverse-proxy-my-app-into-a-subfolder/8575).
+The `prefix` directive is optional but has to be used if a webdav share is used in combination with matchers or path manipulations. This is because webdav uses absolute paths in its response. There exist a similar issue when using reverse proxies, see [The "subfolder problem", OR, "why can't I reverse proxy my app into a subfolder?"](https://caddy.community/t/the-subfolder-problem-or-why-cant-i-reverse-proxy-my-app-into-a-subfolder/8575).
 
 ```
 webdav /some/path/match/* {
@@ -51,6 +47,36 @@ webdav /some/path/match/* {
 }
 ```
 
+If you want to serve WebDAV and directory listing under same path (similar behaviour as in Apache and Nginx), you may use [Request Matchers](https://caddyserver.com/docs/caddyfile/matchers) to filter out GET requests and pass those to [file_server](https://caddyserver.com/docs/caddyfile/directives/file_server).
+
+Example with authenticated WebDAV and directory listing under the same path:
+
+```
+@get method GET
+
+route {
+    basicauth {
+        username hashed_password_base64
+    }
+    file_server @get browse
+    webdav
+}
+```
+
+Or, if you want to create a public listing, but keep WebDAV behind authentication:
+
+```
+@notget not method GET
+
+route @notget {
+    basicauth {
+        username hashed_password_base64
+    }
+    webdav
+}
+file_server browse
+```
+
 ## Credit
 
 Special thanks to @hacdias for making caddy-webdav for Caddy 1, from which this work is derived: https://github.com/hacdias/caddy-webdav