remove MySQL folder mount

- suspecting that we're not supposed to mount the MySQL folder in the CodeSpaces environment. It looks like our MySQL fails to start for some reason. That's why the 'mysql_service' name does not DNS-resolve unlike 'php' or 'nginx'
Let's try
- also, port 3306 does not need to be exposed in devcontainer.json, unless we try to access it from the outside.

.devcontainer/devcontainer.json

@@ -41,7 +41,7 @@
 		}
 	},
 
-	"forwardPorts": [80,3306],
+	"forwardPorts": [80],
 
 	// execute our one-time repo init if /vendor/ does not exist
 	"postCreateCommand": "sh init_repo.sh"

.devcontainer/docker-compose.yml

@@ -58,20 +58,20 @@ services:
       # the two variales below don't seem to be used at all. Commenting out for now
       #MYSQL_USER: myuser 
       #MYSQL_PASSWORD: mypassword
-    volumes:
+    #volumes:
       # map local /data/ folder to container /var/lib/mysql for MySQL data persistence
-      - ${MYSQL_DATA_HOST_PATH}:${MYSQL_DATA_CONTAINER_PATH}
+      # - ${MYSQL_DATA_HOST_PATH}:${MYSQL_DATA_CONTAINER_PATH}
     ports:
       - "3306:3306"
       # host_port:container_port
 
 
-  redis:
-      image: redis:latest
-      ports:
-        - "6379:6379"
-      volumes:
-        - ${REDIS_DATA_HOST_PATH}:${REDIS_DATA_CONTAINER_PATH}
+#  redis:
+#      image: redis:latest
+#      ports:
+#        - "6379:6379"
+#      volumes:
+#        - ${REDIS_DATA_HOST_PATH}:${REDIS_DATA_CONTAINER_PATH}
 
 # Notes:
 #