add workflows

.github/workflows/docker.yml

@@ -0,0 +1,41 @@
+name: Docker Image
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+env: 
+  DOCKER_REPOSITORY: meetcw/ms-ra-forwarder
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Docker Setup QEMU
+      uses: docker/[email protected]
+
+    - name: Docker Setup Buildx
+      uses: docker/[email protected]
+
+    - name: Docker Login
+      uses: docker/[email protected]
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - name: Create Docker image tag
+      run: echo DATE_TAG=$(date +%y%m%d%H%M%S) >> $GITHUB_ENV
+
+    - name: Push the Docker image
+      uses: docker/[email protected]
+      with:
+        push: true
+        tags: |
+          ${{ env.DOCKER_REPOSITORY }}:${{ env.DATE_TAG }}
+          ${{ env.DOCKER_REPOSITORY }}:latest