fix(ci): try speed up docker build

.github/workflows/build-docker.yml

@@ -29,13 +29,7 @@ jobs:
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}.{{minor}}
             type=sha
-            type=raw,value=latest
-            type=ref,event=branch
-            type=ref,event=tag
-          labels: |
-            org.opencontainers.image.title=${{ env.IMAGE_NAME }}
-            org.opencontainers.image.source=https://github.com/krau/SaveAny-Bot
-            org.opencontainers.image.url=https://github.com/krau/SaveAny-Bot
+            type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
@@ -50,23 +44,20 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract version from Git Ref
-        id: extract_version
-        run: |
-          VERSION=$(echo "${{ github.ref }}" | sed 's/refs\/tags\/v//')
-          echo "VERSION=${VERSION}" >> $GITHUB_ENV
-
       - name: Build and push Docker image
+        id: build-and-push
         uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64
-          cache-from: type=gha
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: |
+            type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+            type=gha
           cache-to: type=gha,mode=max
           build-args: |
             VERSION=${{ steps.meta.outputs.version }}
             GitCommit=${{ github.sha }}
-            BuildTime=${{ format(github.event.repository.updated_at, 'yyyy-MM-dd HH:mm:ss') }}
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+            BuildTime=${{ fromJson(toJSON(github.event.repository.pushed_at)) }}

Dockerfile

@@ -6,15 +6,18 @@ ARG BuildTime="Unknown"
 
 WORKDIR /app
 
-COPY . .
+COPY go.mod go.sum ./
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go mod download
 
+COPY . .
 RUN --mount=type=cache,target=/root/.cache/go-build \
     --mount=type=cache,target=/go/pkg \
     CGO_ENABLED=0 \ 
     go build -trimpath \ 
     -ldflags "-s -w \ 
     -X github.com/krau/SaveAny-Bot/common.Version=${VERSION} \
-    -X github.com/krau/SaveAny-Bot/common.GitCommit=${GiTCommit} \
+    -X github.com/krau/SaveAny-Bot/common.GitCommit=${GitCommit} \
     -X github.com/krau/SaveAny-Bot/common.BuildTime=${BuildTime}" \
     -o saveany-bot .