This one seems to be valid

.drone.yml

@@ -173,10 +173,10 @@ steps:
   image: docker
   privileged: true
   environment:
-    - CONTAINER_PREFIX: dev
+    CONTAINER_PREFIX: dev
-    - HOST: area51.mifi.dev
+    HOST: area51.mifi.dev
-    - ROUTE_PREFIX: /auth
+    ROUTE_PREFIX: /auth
-    - PORT: 9001
+    PORT: 9001'
   commands:
     - docker compose -f docker-compose.staging.yml pull
     - docker compose -f docker-compose.staging.yml build --no-cache