split compose file

docker-compose.mysql.yml

@@ -0,0 +1,12 @@
+services:
+    mysql:
+        container_name: mysql
+        environment:
+            MYSQL_DATABASE: example
+            MYSQL_PASSWORD: example
+            MYSQL_ROOT_PASSWORD: example
+            MYSQL_USER: example
+        image: mysql:5.7
+        restart: unless-stopped
+        volumes:
+        - /opt/mysql:/var/lib/mysql