Added release action.

.github/workflows/release.yml

@@ -0,0 +1,52 @@
+name: release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+    container:
+      image: ghcr.io/armmbed/mbed-os-env:master-latest
+    runs-on: ubuntu-latest
+    env:
+      SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
+    strategy:
+      matrix:
+        target: [LEXXPLUSS_PB01]
+        profile: [release]
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: build
+        run: |
+          set -e
+          mbed-tools deploy
+          mbed-tools compile -t GCC_ARM -m ${{ matrix.target }} --profile ${{ matrix.profile }}
+      - name: release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          draft: false
+          prerelease: false
+      - name: upload
+        id: upload-release-asset 
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./cmake_build/LEXXPLUSS_PB01/develop/GCC_ARM/mbed-os-powerboard.bin
+          asset_name: mbed-os-powerboard.bin
+          asset_content_type: application/octet-stream
+      - uses: act10ns/slack@v1
+        with:
+          status: ${{ job.status }}
+          steps: ${{ toJson(steps) }}
+          channel: '#div-02-robotics-ci'
+        if: always()