Add docker-compose (further simplify docker setup) (#55)

* Add docker-compose.yml

Add docker compose to further simplify the setup of the docker project. 

This eliminates the need to specify the need for defining ports and volumes in the command and moves it to the docker-compose file instead.

* Update README.md

Add docker-compose command to documentation

* Update README.md (docker instructions)

Update md formating for docker commands (this enables one-click-copy in the github preview)

README.md

@@ -28,9 +28,18 @@ Default channel example: https://synctube.onrender.com/
 - Open showed "Local" link for yourself and send "Global" link to friends
 
 ### Setup (Docker)
-- As alternative, you can install Docker and run:
-- `docker build -t synctube .`
-- `docker run --rm -it -p 4200:4200 -v ${PWD}/user:/usr/src/app/user synctube`
+As alternative, you can install Docker and run:
+> ```shell
+> docker build -t synctube .
+> docker run --rm -it -p 4200:4200 -v ${PWD}/user:/usr/src/app/user synctube
+> ```
+
+or 
+
+> ```shell
+> docker compose up -d
+> ```
+
 - (Docker container hides real local/global ips, so you need to checkout it manually)
 
 ### Configuration

docker-compose.yml

@@ -0,0 +1,11 @@
+# Run this as follows: 'docker compose up'  (keep running in terminal session, exist via [STRG] + [C]) 
+#                   or 'docker compose up -d' (keep running in background)
+version: "3"
+services:
+  synctube:
+     build: .
+    #image: synctube
+     ports:
+       - "4200:4200"
+     volumes:
+       - "${PWD}/user:/usr/src/app/user"