ci: seperate out build and pull request verify action

Author: abose

.github/workflows/build_verify.yml

@@ -3,9 +3,6 @@ name: Phoenix build verification
 on:
   push:
     branches: [ main ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ main ]
 
 jobs:
   build-tasks:

.github/workflows/pull_request_verify.yml

@@ -0,0 +1,20 @@
+name: Phoenix build verification
+
+on:
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build-tasks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Npm Install
+        run: |
+          npm ci
+      - name: eslint using npm run eslint
+        run: |
+          npm run lint
+      - name: building Phoenix with npm run build
+        run: |
+          npm run build