Store example docker-compose config

Author: vmcj

docker/README.md

@@ -128,6 +128,9 @@ docker exec -it domserver supervisorctl restart [service]
 
 where `[service]` is one of `nginx` or `php`.
 
+#### Docker-compose
+See https://github.com/DOMjudge/domjudge-packaging/blob/main/docker/docker-compose.yml for a docker-compose example which automates the steps above.
+
 ### Judgehost container
 
 To run a single judgehost, run the following command:

docker/docker-compose.yml

@@ -0,0 +1,27 @@
+version: '3'
+
+services:
+  mariadb:
+    image: docker.io/mariadb
+    hostname: mariadb
+    environment:
+      - MYSQL_ROOT_PASSWORD=domjudge
+      - MYSQL_USER=domjudge
+      - MYSQL_PASSWORD=djpw
+      - MYSQL_DATABASE=domjudge
+    ports:
+      - 13306:3306
+    command: --max-connections=1000 --max-allowed-packet=512M
+    volumes:
+      - /var/lib/mysql
+  domjudge:
+    image: docker.io/domjudge/domserver
+    hostname: domserver
+    environment:
+      - MYSQL_ROOT_PASSWORD=domjudge
+      - MYSQL_USER=domjudge
+      - MYSQL_PASSWORD=djpw
+      - MYSQL_DATABASE=domjudge
+      - MYSQL_HOST=mariadb
+    ports:
+      - 12345:80