Only run packaging and image builds when in the main repo

.woodpecker.yaml

@@ -20,7 +20,9 @@ steps:
       - pip_username
       - pip_token
     when:
-      event: tag
+      - repo: libertytechforce/http2smtp
+        branch: master
+        event: tag
   nightly-image:
     image: docker
     commands:
@@ -34,7 +36,8 @@ steps:
       - docker_username
       - docker_token
     when:
-      - branch: master
+      - repo: libertytechforce/http2smtp
+        branch: master
         event: push
   release-image:
     image: docker
@@ -49,5 +52,6 @@ steps:
       - docker_username
       - docker_token
     when:
-      - branch: master
+      - repo: libertytechforce/http2smtp
+        branch: master
         event: tag