create master-build.yml

This patch adds the tox and docker image build for the latest container image on every push to master branch

.github/workflows/master-build.yml

@@ -0,0 +1,51 @@
+name: Test and Build Latest Container Image
+
+on:
+  push:
+    branches: [ "master" ]
+
+jobs:
+  tox:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.7, 3.8, 3.9]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install tox tox-gh-actions
+    - name: Test with tox
+      run: tox
+
+  build:
+    needs: tox
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Get Branch Name
+      id: branch-name
+      uses: tj-actions/branch-names@v6
+    - name: Setup QEMU
+      uses: docker/setup-qemu-action@v2
+    - name: Setup Docker Buildx
+      uses: docker/setup-buildx-action@v2
+    - name: Login to Docker HUB
+      uses: docker/login-action@v2
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+    - name: Build the Docker image
+      uses: docker/build-push-action@v3
+      with:
+        context: ./docker
+        platforms: linux/amd64,linux/arm64,linux/arm/v6,linux/arm/v7
+        push: true
+        tags: |
+          hemna6969/aprsd:${{ steps.branch-name.outputs.current_branch }}
+          hemna6969/aprsd:latest