moved image name to docker-compose.yml, only version in .env

docker-compose.yml

@@ -2,7 +2,7 @@ version: "3"
 
 services:
   app:
-    image: ${GITEA_VERSION}
+    image: gitea/gitea:${GITEA_VERSION}
     restart: unless-stopped
     depends_on:
       - db
@@ -37,7 +37,7 @@ services:
     ports:
       - ${SSH_PORT}:22
   db:
-    image: ${MYSQL_VERSION}
+    image: mariadb:${MYSQL_VERSION}
     restart: unless-stopped
     environment:
       - MYSQL_DATABASE=${MYSQL_DATABASE}