add github workflow

.github/workflows/docker.yml

@@ -0,0 +1,88 @@
+name: Build & Publish to Docker Hub
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+jobs:
+  build_and_push:
+    name: Build & Publish
+    runs-on: ubuntu-latest
+    if: contains(github.event.head_commit.message, '[no build]') == false
+    strategy:
+      matrix:
+        include:
+          - name: base
+            path: ''
+            suffix: ''
+            qemu: false
+          - name: nvidia
+            path: 'nvidia.'
+            suffix: '-nvidia'
+            qemu: false
+          - name: vaapi
+            path: 'vaapi.'
+            suffix: '-vaapi'
+            qemu: false
+          - name: arm32v7
+            path: 'arm32v7.'
+            suffix: '-arm'
+            qemu: true
+          - name: arm64
+            path: 'arm64.'
+            suffix: '-arm64'
+            qemu: true
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        if: ${{ matrix.qemu == true }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+        id: docker-buildx
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.docker_hub_username }}
+          password: ${{ secrets.docker_hub_access_token }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          builder: ${{ steps.docker-buildx.outputs.name }}
+          context: .
+          file: ./docker/${{ matrix.path }}Dockerfile
+          push: true
+          tags: |
+            jasongdove/ersatztv-ffmpeg:5.1.2${{ matrix.suffix }}
+        if: ${{ matrix.name != 'arm64' && matrix.name != 'arm32v7' }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          builder: ${{ steps.docker-buildx.outputs.name }}
+          context: .
+          file: ./docker/${{ matrix.path }}Dockerfile
+          push: true
+          platforms: 'linux/arm64'
+          tags: |
+            jasongdove/ersatztv-ffmpeg:5.1.2${{ matrix.suffix }}
+        if: ${{ matrix.name == 'arm64' }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          builder: ${{ steps.docker-buildx.outputs.name }}
+          context: .
+          file: ./docker/${{ matrix.path }}Dockerfile
+          push: true
+          platforms: 'linux/arm/v7'
+          tags: |
+            jasongdove/ersatztv-ffmpeg:5.1.2${{ matrix.suffix }}
+        if: ${{ matrix.name == 'arm32v7' }}