adapt mariadb with volume and access outside of the stack

docker-compose.yml

@@ -1,13 +1,17 @@
 version: '3.8'
 services:
-#   mariadb:
-#     image: mariadb
-#     restart: on-failure
-#     environment:
-#       MYSQL_ROOT_PASSWORD: root_password    
-#       MYSQL_USER: my_user
-#       MYSQL_PASSWORD: my_password
-#       MYSQL_DATABASE: my_database_name
+  # mariadb:
+  #   image: mariadb
+  #   restart: on-failure
+  #   volumes: 
+  #     - database_pokedex:/var/lib/mysql
+  #   ports:
+  #     - '3306:3306'
+  #   environment:
+  #     MYSQL_ROOT_PASSWORD: root_password    
+  #     MYSQL_USER: my_user
+  #     MYSQL_PASSWORD: my_password
+  #     MYSQL_DATABASE: my_pokedex
 
   nginx:
     image: nginx:1.19-alpine
@@ -27,4 +31,7 @@ services:
     restart: on-failure
     volumes:
       - '.:/usr/src/app'
-    user: 1000:1000
+    user: 1000:1000
+
+# volumes: 
+#   database_pokedex: