docs: improve docker docs (#4183)

* docs: improve docker docs

* fix: cleanup and remove duplicate docker instructions

docs/04_For_Developers/07_Development_Environment_Setup.md

@@ -1,39 +1,5 @@
-These are examples of how to setup a local development environment to add bridges, improve the docs, etc.
 
-## Docker
-
-The following can serve as an example for using docker:
-
-```
-# create a new directory
-mkdir rss-bridge-contribution
-cd rss-bridge-contribution
-
-# clone the project into a subfolder
-git clone https://github.com/RSS-Bridge/rss-bridge
-```
-
-Then add a `docker-compose.yml` file:
-
-```yml
-version: '3'
-
-services:
-  rss-bridge:
-    build:
-      context: ./rss-bridge
-    ports:
-      - 3000:80
-    volumes:
-      - ./config:/config
-      - ./rss-bridge/bridges:/app/bridges
-```
-
-You can then access RSS-Bridge at `localhost:3000` and [add your bridge](../05_Bridge_API/How_to_create_a_new_bridge) to the `rss-bridge/bridges` folder.
-
-If you need to edit any other files, like from the `lib` folder add this to the `volumes` section: `./rss-bridge/lib:/app/lib`.
-
-### Docs with Docker
+## Docs with Docker
 
 If you want to edit the docs add this to your docker-compose.yml: