add ready-to-use docker-compose file

Author: FlorianSW

README.md

@@ -24,18 +24,10 @@ There are basically two ways to run and configure this discord bot:
 The easiest method to install and use this bot is by running it in a docker container. I suggest to use docker-compose
 for that, however, starting the container with `docker run` should be fine as well.
 
-```yaml
-version: "3"
-
-services:
-  serviceName:
-    image: droidwiki/discord-player-count
-    restart: unless-stopped
-    volumes:
-      - ./config:/app/config
-    environment:
-      DISCORD_TOKEN: YOUR_DISCORD_BOT_TOKEN
-      # You need more configuration here, look at the Configuration section
+There is a ready-to-use `docker-compose-yml` file available in this repository.
+Simply create a `.env` file next to it (copying the contents of the `example.env file), set the necessary configuration values as described further in this README and run this command to start the bot:
+```shell
+docker-compose up -d
 ```
 
 You can run as many containers as you want, one container per game server you want to track.

docker-compose.yml

@@ -0,0 +1,30 @@
+version: "3"
+
+services:
+  test:
+    image: droidwiki/discord-player-count
+    restart: unless-stopped
+    volumes:
+      - ./config:/app/config
+    environment:
+      # Instead of writing the environment variables here, use a `.env` file in the same directory where
+      # the docker-compose.yml file is located. Use the example.env file contents as a blueprint.
+      # Add the necessary configuration values there.
+      DISCORD_TOKEN: ${DISCORD_TOKEN}
+      DISCORD_MESSAGE_CHANNEL_ID: ${DISCORD_MESSAGE_CHANNEL_ID}
+      PLAYER_COUNT_PROVIDER: ${PLAYER_COUNT_PROVIDER}
+      DISCORD_PUBLISHER_MESSAGE_FORMAT: ${DISCORD_PUBLISHER_MESSAGE_FORMAT}
+      DISCORD_PUBLISHER_MESSAGE_QUEUED_FORMAT: ${DISCORD_PUBLISHER_MESSAGE_QUEUED_FORMAT}
+      STEAM_API_TOKEN: ${STEAM_API_TOKEN}
+      GAME_ADDRESS: ${GAME_ADDRESS}
+      BM_ACCESS_TOKEN: ${BM_ACCESS_TOKEN}
+      BM_SERVER_ID: ${BM_SERVER_ID}
+      GAME_TYPE: ${GAME_TYPE}
+      GAME_IP: ${GAME_IP}
+      GAME_QUERY_PORT: ${GAME_QUERY_PORT}
+      BE_RCON_HOST: ${BE_RCON_HOST}
+      BE_RCON_PORT: ${BE_RCON_PORT}
+      BE_RCON_PASSWORD: ${BE_RCON_PASSWORD}
+      BE_RCON_MAX_PLAYERS: ${BE_RCON_MAX_PLAYERS}
+      CFTOOLS_HOSTNAME: ${CFTOOLS_HOSTNAME}
+      CFTOOLS_PORT: ${CFTOOLS_PORT}