Add info on fe to setup of dev env

I added info about installing front ends from the development branch

I also rearanged the list of exceptions (what's different than "normal" installation)
so the order is closer to how you'd encounter things in the installation docs + small fixes

docs/docs/development/setting_up_akkoma_dev.md

@@ -5,17 +5,32 @@ Akkoma requires some adjustments from the defaults for running the instance loca
 ## Installing
 
 1. Install Akkoma as explained in [the docs](../installation/debian_based_en.md), with some exceptions:
-    * You can use your own fork of the repository and add akkoma as a remote `git remote add akkoma 'https://akkoma.dev/AkkomaGang/akkoma.git'`
-    * You can skip systemd and nginx and all that stuff
     * No need to create a dedicated akkoma user, it's easier to just use your own user
-    * For the DB you can still choose a dedicated user, the mix tasks set it up for you so it's no extra work for you
+    * You can use your own fork of the repository and add akkoma as a remote `git remote add akkoma 'https://akkoma.dev/AkkomaGang/akkoma.git'`
     * For domain you can use `localhost`
+    * For the DB you can still choose a dedicated user. The mix tasks sets it up, so it's no extra work for you
     * instead of creating a `prod.secret.exs`, create `dev.secret.exs`
     * No need to prefix with `MIX_ENV=prod`. We're using dev and that's the default MIX_ENV
+    * You can skip nginx and systemd
+    * For front-end, you'll probably want to install and use the develop branch instead of the stable branch. There's no guarantee that the stable branch of the FE will always work on the develop branch of the BE.
 2. Change the dev.secret.exs
+    * Change the FE settings to use the installed branch (see also [Frontend Management](/configuration/frontend_management/))
     * Change the scheme in `config :pleroma, Pleroma.Web.Endpoint` to http (see examples below)
     * If you want to change other settings, you can do that too
-3. You can now start the server `mix phx.server`. Once it's build and started, you can access the instance on `http://<host>:<port>` (e.g.http://localhost:4000 ) and should be able to do everything locally you normaly can.
+3. You can now start the server with `mix phx.server`. Once it's build and started, you can access the instance on `http://<host>:<port>` (e.g.http://localhost:4000 ) and should be able to do everything locally you normally can.
+
+Example on how to install pleroma-fe and admin-fe using it's develop branch
+```sh
+mix pleroma.frontend install pleroma-fe --ref develop
+mix pleroma.frontend install admin-fe --ref develop
+```
+
+Example config to use the pleroma-fe and admin-fe installed from the develop branch
+```elixir
+config :pleroma, :frontends,
+  primary: %{"name" => "pleroma-fe", "ref" => "develop"},
+  admin: %{"name" => "admin-fe", "ref" => "develop"}
+```
 
 Example config to change the scheme to http. Change the port if you want to run on another port.
 ```elixir
@@ -94,4 +109,4 @@ Update Akkoma as explained in [the docs](../administration/updating.md). Just ma
 
 ## Working on multiple branches
 
-If you develop on a separate branch, it's possible you did migrations that aren't merged into another branch you're working on. If you have multiple things you're working on, it's probably best to set up multiple Akkoma instances each with their own database. If you finished with a branch and want to switch back to develop to start a new branch from there, you can drop the database and recreate the database (e.g. by using `config/setup_db.psql`). The commands to drop and recreate the database can be found in [the docs](../administration/backup.md).
+If you develop on a separate branch, it's possible you did migrations that aren't merged into another branch you're working on. In that case, it's probably best to set up multiple Akkoma instances each with their own database. If you finished with a branch and want to switch back to develop to start a new branch from there, you can drop the database and recreate the database (e.g. by using `config/setup_db.psql`). The commands to drop and recreate the database can be found in [the docs](../administration/backup.md).