Update docker workflow

.github/workflows/docker.yml

@@ -4,13 +4,35 @@ on:
   release:
     types:
       - released
-
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "The tag version you want to build"
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - name: Get commit to build
+        id: ref
+        run: |-
+          if [[ -z "${{ github.event.inputs.tag }}" ]]; then
+            ref="${{ github.ref_name }}"
+          else
+            ref="${{ github.event.inputs.tag }}"
+          fi
+          echo "ref=$ref"
+          echo "ref=$ref" >> $GITHUB_OUTPUT
+          if [[ $ref == *"-"* ]]; then
+            latest=latest-beta
+          else
+            latest=latest
+          fi
+          echo "latest=$latest"
+          echo "latest=$latest" >> $GITHUB_OUTPUT
       - name: Checkout
         uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4
+        with:
+          ref: ${{ steps.ref.outputs.ref }}
       - name: Setup Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Setup QEMU for Docker Buildx
@@ -30,10 +52,11 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           platforms: linux/386,linux/amd64,linux/arm64,linux/s390x
+          context: .
           target: dist
           build-args: |
             BUILDKIT_CONTEXT_KEEP_GIT_DIR=1
           tags: |
-            ghcr.io/sagernet/sing-box:latest
-            ghcr.io/sagernet/sing-box:${{ github.ref_name }}
+            ghcr.io/sagernet/sing-box:${{ steps.ref.outputs.latest }}
+            ghcr.io/sagernet/sing-box:${{ steps.ref.outputs.ref }}
           push: true