feat: Add Docker release workflow and enhance release process with Termux support

Author: abolix

.github/workflows/docker-release.yml

@@ -0,0 +1,78 @@
+name: Docker Release
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+    inputs:
+      publish:
+        description: "Push image to GHCR"
+        required: false
+        default: false
+        type: boolean
+      image_name:
+        description: "GHCR image name (without ghcr.io/), default: owner/masterhttprelayvpn"
+        required: false
+        type: string
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  docker-multiarch:
+    name: Build Docker amd64+arm64
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/v') || (github.event_name == 'workflow_dispatch' && github.event.inputs.publish == 'true')
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Resolve image and tags
+        id: meta
+        shell: bash
+        run: |
+          set -euo pipefail
+          owner=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
+          if [ -n "${{ github.event.inputs.image_name || '' }}" ]; then
+            image="ghcr.io/${{ github.event.inputs.image_name }}"
+          else
+            image="ghcr.io/${owner}/masterhttprelayvpn"
+          fi
+
+          if [ "${{ github.event_name }}" = "push" ]; then
+            tag="${{ github.ref_name }}"
+          else
+            tag="manual-${{ github.run_number }}"
+          fi
+
+          {
+            echo "image=$image"
+            echo "tag=$tag"
+          } >> "$GITHUB_OUTPUT"
+
+      - name: Build and push image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            ${{ steps.meta.outputs.image }}:${{ steps.meta.outputs.tag }}
+            ${{ steps.meta.outputs.image }}:latest