优化 Docker 发布流程，默认单架构构建

.github/workflows/docker-publish.yml

@@ -2,9 +2,16 @@ name: Publish Docker Image
 
 on:
   push:
+    branches:
+      - main
     tags:
       - "v*"
   workflow_dispatch:
+    inputs:
+      platforms:
+        description: "Comma-separated Docker platforms to build"
+        required: false
+        default: "linux/amd64"
 
 env:
   IMAGE_NAME: webchat2api
@@ -22,7 +29,44 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Prepare Docker build settings
+        id: build_settings
+        shell: bash
+        env:
+          REQUESTED_PLATFORMS: ${{ github.event.inputs.platforms || '' }}
+        run: |
+          if [[ "${GITHUB_EVENT_NAME}" == "workflow_dispatch" && -n "${REQUESTED_PLATFORMS}" ]]; then
+            platforms="${REQUESTED_PLATFORMS}"
+          elif [[ "${GITHUB_REF_TYPE}" == "tag" ]]; then
+            platforms="linux/amd64,linux/arm64"
+          else
+            platforms="linux/amd64"
+          fi
+
+          platforms="${platforms//[[:space:]]/}"
+          if [[ -z "${platforms}" ]]; then
+            platforms="linux/amd64"
+          fi
+
+          IFS=',' read -ra requested_platforms <<< "${platforms}"
+          for platform in "${requested_platforms[@]}"; do
+            if [[ "${platform}" != "linux/amd64" && "${platform}" != "linux/arm64" ]]; then
+              echo "Unsupported Docker platform: ${platform}. Supported platforms: linux/amd64,linux/arm64" >&2
+              exit 1
+            fi
+          done
+
+          if [[ "${platforms}" == *,* ]]; then
+            cache_mode="max"
+          else
+            cache_mode="min"
+          fi
+
+          echo "platforms=${platforms}" >> "$GITHUB_OUTPUT"
+          echo "cache_mode=${cache_mode}" >> "$GITHUB_OUTPUT"
+
       - name: Set up QEMU
+        if: ${{ contains(steps.build_settings.outputs.platforms, 'arm') }}
         uses: docker/setup-qemu-action@v3
         with:
           platforms: arm64
@@ -64,9 +108,9 @@ jobs:
           context: .
           file: ./Dockerfile
           target: app
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ steps.build_settings.outputs.platforms }}
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
-          cache-to: type=gha,mode=max
+          cache-to: type=gha,mode=${{ steps.build_settings.outputs.cache_mode }}