updates to GH flow, to use branch (#484)

* updates to GH flow, to use branch

* removed prelease incorrect tag

* upds

* got back tag creation check

* upds

* comments updated

* final upds to handle the flow

* Updated to use release::create for CI/CD image build/push flow

.github/workflows/tagBasedImageBuild.yml

@@ -1,11 +1,11 @@
 name: Tag Based Image Build
 
 on:
-  create: # This listens to create events, which includes tag creations
+  release:
+    types: [created] # This listens to release creation events
 
 jobs:
   buildImageForNewTag:
-    if: startsWith(github.ref, 'refs/tags/') # Only run this job when a tag is created
     runs-on: ubuntu-latest
 
     steps:
@@ -17,6 +17,9 @@ jobs:
 
       - name: Checkout code
         uses: actions/checkout@v2
+        with:
+          # Fetches the branch at which the release was made
+          ref: ${{ github.event.release.target_commitish }}
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
@@ -35,10 +38,10 @@ jobs:
           platforms: linux/amd64,linux/arm64
           push: true
           tags: |
-            thirdweb/engine:${{ github.ref_name }}
-            thirdweb/engine:latest
+            thirdweb/engine:${{ github.event.release.tag_name }}
+            ${{ github.event.release.target_commitish == 'main' && 'thirdweb/engine:latest' }}
           build-args: |
-            ENGINE_VERSION=${{ github.ref_name }}
+            ENGINE_VERSION=${{ github.event.release.tag_name }}
 
       - name: Check Disk Space After Build
         run: df -h