Move from azure pipelines to GitHub actions for build (#6)

.github/workflows/builder.yml

@@ -0,0 +1,68 @@
+name: Build plugin
+
+on:
+  pull_request:
+    branches: ["master"]
+  release:
+    types: ["published"]
+  push:
+    branches: ["master"]
+    paths:
+    - Dockerfile
+    - build.json
+    - 'rootfs/**'
+
+env:
+  BUILD_NAME: multicast # This needs to match the key in the version file
+  BUILD_TYPE: plugin # Can be plugin, core, supervisor or generic
+
+jobs:
+  build:
+    name: Build plugin
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout the repository
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - name: Get version
+      id: version
+      uses: home-assistant/actions/helpers/version@master
+      with:
+        type: ${{ env.BUILD_TYPE }}
+
+    - name: Initialize git
+      if: steps.version.outputs.publish == 'true'
+      uses: home-assistant/actions/helpers/git-init@master
+      with:
+        name: ${{ secrets.GIT_NAME }}
+        email: ${{ secrets.GIT_EMAIL }}
+        token: ${{ secrets.GIT_TOKEN }}
+
+    - name: Login to DockerHub
+      if: steps.version.outputs.publish == 'true'
+      uses: docker/login-action@v1
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - name: Set build arguments
+      if: steps.version.outputs.publish == 'false'
+      run: echo "BUILD_ARGS=--test" >> $GITHUB_ENV
+
+    - name: Build plugin
+      uses: home-assistant/builder@2020.10.0
+      with:
+        args: |
+          $BUILD_ARGS \
+          --all \
+          --target /data \
+          --generic ${{ steps.version.outputs.version }}
+    - name: Update version file
+      if: steps.version.outputs.publish == 'true'
+      uses: home-assistant/actions/helpers/version-push@master
+      with:
+        key: ${{ env.BUILD_NAME }}
+        version: ${{ steps.version.outputs.version }}
+        channel: ${{ steps.version.outputs.channel }} 

README.md

@@ -1,2 +1,3 @@
 # plugin-multicast
+
 Multicast implementation for Home Assistant