feat: Added example docker compose

Author: 1grzyb1

README.md

@@ -35,6 +35,8 @@ docker run -e AOC_SLACK_LEADERBOARD_ID=<leaderboard_id> \
            1grzyb1/aoc-slack:latest
 ```
 
+or use example `docker-compose.yml`. Pass there your variables and just run `docker-compose up -d`
+
 #### Properties description
 
 | Property                              | Description                                                                                       |

docker-compose.yml

@@ -0,0 +1,12 @@
+version: '3.8'
+
+services:
+  aoc-slack:
+    image: 1grzyb1/aoc-slack:latest
+    container_name: aoc-slack
+    environment:
+      - AOC_SLACK_LEADERBOARD_ID={LEADERBOARD_ID}
+      - AOC_SLACK_SESSION={AOC_SESSION}
+      - AOC_SLACK_WEBHOOK_URL={SLACK_WEBHOOK_URL}
+    network_mode: host
+    restart: always