Streamline routing

- put openapi doc behind `api/doc` instead of `app/doc`
- don't require `index.html` for the webapp

modules/microsite/docs/api.md

@@ -45,7 +45,7 @@ server. If it is deployed at `http://localhost:7880`, then check this
 url:
 
 ```
-http://localhost:7880/app/doc
+http://localhost:7880/api/doc
 ```
 
 ## Examples

modules/microsite/docs/doc/install.md

@@ -150,8 +150,8 @@ $ ./docspell-joex*/bin/docspell-joex /path/to/joex-config.conf
 ```
 
 After starting the rest server, you can reach the web application at
-path `/app/index.html`, so using default values it would be
-`http://localhost:7880/app/index.html`.
+path `/app`, so using default values it would be
+`http://localhost:7880/app`.
 
 You should be able to create a new account and sign in. Check the
 [configuration page](configure.html) to further customize docspell.

modules/microsite/docs/doc/uploading.md

@@ -53,7 +53,7 @@ Example screenshot:
 
 This example shows a source with name "test". It defines two urls:
 
-- `/app/index.html#/upload/<id>`
+- `/app#/upload/<id>`
 - `/api/v1/open/upload/item/<id>`
 
 The first points to a web page where everyone could upload files into

modules/microsite/docs/getit.md

@@ -42,7 +42,7 @@ really required, but improves OCR.
    $ ./docspell-joex*/bin/docspell-joex
    ```
    in the other.
-4. Point your browser to: <http://localhost:7880/app/index.html>
+4. Point your browser to: <http://localhost:7880/app>
 5. Register a new account, sign in and try it.
 
 Check the [documentation](doc.html) for more information on how to use