Update build_docker.yml (aurora-develop#77)

.github/workflows/build_docker.yml

@@ -33,7 +33,9 @@ jobs:
         uses: actions/cache@v2
         with:
           path: /tmp/.buildx-cache
-          key: ${{ runner.os }}-buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
 
       - name: Build and push to GHCR
         uses: docker/build-push-action@v2
@@ -42,6 +44,8 @@ jobs:
           platforms: linux/amd64,linux/arm64
           file: Dockerfile
           push: true
-          tags: ${{ env.GHCR_REPO }}:latest
+          tags: |
+            ${{ env.GHCR_REPO }}:latest
+            ${{ env.GHCR_REPO }}:${{ github.sha }}
           cache-from: type=local,src=/tmp/.buildx-cache
-          cache-to: type=local,dest=/tmp/.buildx-cache,mode=max
+          cache-to: type=local,dest=/tmp/.buildx-cache,mode=max