Add CI to telegraf (influxdata#1)

.github/workflows/build.yml

@@ -0,0 +1,26 @@
+name: Build telegraf on push
+
+on:
+  push:
+    branches:
+      - "develop"
+  workflow_dispatch:
+env:
+  RUN_NUMBER: ${{ github.run_number }}
+  TELEGRAF_VERSION: 1.20.0 # needs to be updated manually
+
+jobs:
+  prebuild:
+    name: Build Telegraf
+    runs-on: ubuntu-latest
+    if: github.repository_owner == 'vunetsystems'
+    steps:
+      - uses: actions/checkout@v2
+      - run: make telegraf
+      - name: Create Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: telegraf
+          tag_name: v${{ env.TELEGRAF_VERSION }}.${{ env.RUN_NUMBER }}
+          draft: false
+          prerelease: false