fix(ci): configure kaniko auth for local registry

.woodpecker.yml

@@ -26,7 +26,14 @@ matrix:
 steps:
   - name: build-and-push
     image: gcr.io/kaniko-project/executor:v1.23.2-debug
+    environment:
+      REGISTRY_USERNAME:
+        from_secret: REGISTRY_USERNAME
+      REGISTRY_PASSWORD:
+        from_secret: REGISTRY_PASSWORD
     commands:
+      - mkdir -p /kaniko/.docker
+      - echo "{\"auths\":{\"docker-registry.registry.svc.cluster.local:5000\":{\"username\":\"${REGISTRY_USERNAME}\",\"password\":\"${REGISTRY_PASSWORD}\"}}}" > /kaniko/.docker/config.json
       - >-
         /kaniko/executor
         --context .