use curlimages/curl instead of just alpine

.drone.yml

@@ -67,10 +67,9 @@ name: hydra-deploy
 
 steps:
   - name: Notify hydra
-    image: alpine:latest
+    image: curlimages/curl:latest
     commands:
-      - apk add curl
-      - curl --get --data-urlencode "repos=git+$DRONE_GIT_HTTP_URL?ref=$DRONE_COMMIT_BRANCH" https://hydra.chir.rs/api/push
+      - curl --get --data-urlencode "jobsets=nixos-config:nixos-config" https://hydra.chir.rs/api/push
 
 trigger:
   event: