perf: action cache (#300)

.github/workflows/fastgpt-image.yml

@@ -25,6 +25,13 @@ jobs:
         uses: docker/setup-buildx-action@v2
         with:
           driver-opts: network=host
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v2
         with:
@@ -38,7 +45,6 @@ jobs:
           else
             echo "DOCKER_REPO_TAGGED=ghcr.io/${{ github.repository_owner }}/fastgpt:${{ github.ref_name }}" >> $GITHUB_ENV
           fi
-
       - name: Build and publish image for main branch or tag push event
         env:
           DOCKER_REPO_TAGGED: ${{ env.DOCKER_REPO_TAGGED }}
@@ -50,6 +56,8 @@ jobs:
           --label "org.opencontainers.image.description=fastgpt image" \
           --label "org.opencontainers.image.licenses=MIT" \
           --push \
+          --cache-from=type=local,src=/tmp/.buildx-cache \
+          --cache-to=type=local,dest=/tmp/.buildx-cache \
           -t ${DOCKER_REPO_TAGGED} \
           -f Dockerfile \
           .