improve build

Author: conblem

.github/workflows/rust.yaml

@@ -4,7 +4,10 @@ on:
     paths-ignore:
       - 'cross/**'
     branches:
-      - master
+      - dev
+    pull_request:
+      branches:
+        - "**"
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -38,7 +41,7 @@ jobs:
       - uses: docker/build-push-action@v2
         with:
           push: true
-          tags: ghcr.io/conblem/acme-dns-latest:postgres
+          tags: ghcr.io/conblem/acme-dns-latest:${{ github.sha }}
           context: ./
   clippy:
     runs-on: ubuntu-latest