Merge pull request '[fix] Publish feature tagged image on PR open' (#11) from feature_cicd_fix into develop

Reviewed-on: https://git.pbiernat.dev/docker/nginx-php/pulls/11

.drone.yml

@@ -95,7 +95,7 @@ steps:
   - docker push docker.pbiernat.dev/nginx-php:$CI_COMMIT_BRANCH
   when:
     branch: feature_*
-    event: push
+    event: pull_request
   volumes:
   - name: docker-sock
     path: /var/run