Add workflow for release

Author: thecodepapaya

.github/workflows/release.yml

@@ -0,0 +1,50 @@
+# This is a basic workflow to help you get started with Actions
+
+name: APK Build
+
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  # pull_request:
+  #   branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      - name: Export Release Timestamp
+        run: echo "APP_VERSION=v$(date +'%Y.%m.%d.%H.%M.%S')" >> $GITHUB_ENV
+        
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      
+      - name: Flutter action
+      # You may pin to the exact commit or the version.
+      # uses: subosito/flutter-action@4389e6cbc6cb8a4b18c628ff96ff90be0e926aa8
+        uses: subosito/flutter-action@v1.5.3
+        with:
+          # The Flutter build release channel
+          channel: stable
+      - name: Fetch dependencies
+        run: flutter pub get
+#       - name: Run Tests
+#         run: flutter test
+      - name: Build APK
+        run: flutter build apk
+      - name: Release App
+        uses: ncipollo/release-action@v1
+        with:
+          tag: ${{ env.APP_VERSION }}
+          name: ${{ env.APP_VERSION }}
+          token: ${{ secrets.GITHUB_TOKEN }}
+          artifacts: 'build/web/web-app.zip'