Added postgres, mysql and mailhog.

mysql/docker-compose.yml

@@ -0,0 +1,13 @@
+version: '2'
+
+services:
+  mysql:
+    image: mysql:5.7
+    container_name: mysql
+    restart: always
+    ports:
+      - 3306:3306
+    environment:
+      - MYSQL_ROOT_PASSWORD=root
+    volumes:
+      - /home/marvin/docker/mysql/data:/var/lib/mysql