Adds first CI config draft to build the binary

Fixes copy paste error


Fixes artifact upload


Removes unused files from artifact


Adds release step

.github/workflows/ci.yml

@@ -0,0 +1,43 @@
+name: Build CoreDNS utils
+on:
+  push:
+    # Run pipeline for commits on branch 'master' and on 'testing/<stuff>'
+    branches:
+      - master
+      - 'testing/**'
+      - 'feature/**'
+      - 'hotfix/**'
+    # Run pipeline for release tags
+    tags:
+      - 'v*.*.*'
+
+jobs:
+  # Build
+  build:
+    runs-on: [ubuntu-20.04]
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v2
+      - name: Run make
+        run: |
+          make
+      - name: Upload artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: coredns-keygen
+          path: coredns-keygen/coredns-keygen
+
+  # Create a release if running on tag
+  create-release:
+    needs: [build]
+    runs-on: [ubuntu-20.04]
+    # Only run on pushed tags (and explicitely ignore scheduled runs)
+    if: github.event_name == 'push' && contains(github.ref, 'refs/tags/') && github.event_name != 'schedule'
+    steps:
+      - name: Collect artifacts
+        uses: actions/download-artifact@master
+      - name: Release CoreDNS utils
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            coredns-keygen/coredns-keygen