enable gmc build workflow on push (#361)

Signed-off-by: Yingchun Guo <[email protected]>

Author: daisy-ycguo

.github/workflows/push-image-build.yaml

@@ -4,16 +4,16 @@
 name: Upgrade GMC system on push event
 
 on:
-  # push:
-  #   branches: ["main"]
-  #   paths:
-  #     - microservices-connector/**
-  #     - "!microservices-connector/helm/**"
-  #     - "!**.md"
-  #     - "!**.txt"
-  #     - "!**.png"
-  #     - "!.**"
-  #     - .github/workflows/gmc-on-push.yaml
+  push:
+    branches: ["main"]
+    paths:
+      - microservices-connector/**
+      - "!microservices-connector/helm/**"
+      - "!**.md"
+      - "!**.txt"
+      - "!**.png"
+      - "!.**"
+      - .github/workflows/gmc-on-push.yaml
   workflow_dispatch:
 
 concurrency: