fix(ci): triggering action upon tags (#586)

Signed-off-by: Dario Tranchitella <dario@tranchitella.eu>

.github/workflows/ko-build.yml

@@ -2,6 +2,9 @@ name: Container image build
 
 on:
   push:
+    tags:
+      - edge-*
+      - v*
     branches:
       - master
 
@@ -22,7 +25,7 @@ jobs:
       - name: "ko: login to docker.io container registry"
         run: ./bin/ko login docker.io -u ${{ secrets.DOCKER_IO_USERNAME }} -p ${{ secrets.DOCKER_IO_TOKEN }}
       - name: "ko: build and push tag"
-        run: make VERSION=${{ github.ref_name }} KO_LOCAL=false KO_PUSH=true build
-        if: startsWith(github.event.ref, 'v') || startsWith(github.event.ref, 'edge')
+        run: make VERSION=${{ github.ref }} KO_LOCAL=false KO_PUSH=true build
+        if: startsWith(github.ref, 'refs/tags/v') || startsWith(github.ref, 'refs/tags/edge-')
       - name: "ko: build and push latest"
         run: make VERSION=latest KO_LOCAL=false KO_PUSH=true build