build with experimental tag

.github/workflows/docker-publish.yml

@@ -2,7 +2,7 @@ name: Publish Docker Image
 
 on:
   push:
-    branches: [main]
+    branches: [main, experimental-github-actions]
 
 env:
   IMAGE: mango-feeds
@@ -37,10 +37,12 @@ jobs:
       # Build and push the image
       - name: Build and Push Image
         uses: docker/build-push-action@v2
+        run: |
+          source ci/rust-version.sh
         with:
           context: .
           build-args: |
-            RUST_TOOLCHAIN_VERSION=1.71.1
+            RUST_TOOLCHAIN_VERSION=${{ env.RUST_STABLE }}
           push: true
           tags: |
             ${{ env.REGISTRY }}/${{ env.ORG }}/${{ env.IMAGE }}:${{ github.sha }}