Update ".drone.yml"

.drone.yml → drone.yml

@@ -3,13 +3,13 @@ name: default
 
 steps:
 - name: frontend
-  image: debian/stable-slim
+  image: debian/stable
   commands:
   - apt update
   - apt upgrade
 
 - name: backend
-  image: debian/stable-slim
+  image: debian/stable
   commands:
   - apt update
   - apt upgrade