fix: publish image to GHCR (login + lowercase owner)

Author: Kyle Spengler

.github/workflows/release.yml

@@ -1,73 +1,37 @@
-name: Release (Build & Push Image)
+name: Release Image (GHCR)
 
 on:
   push:
     tags:
-      - 'v*'        # e.g. v0.1.0
-  workflow_dispatch:
+      - 'v*'
 
 permissions:
   contents: read
-  packages: write    # required for GHCR
+  packages: write
 
 jobs:
-  ghcr:
+  docker:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - uses: docker/setup-buildx-action@v3
 
-      - name: Compute image name & tag
-        id: prep
-        run: |
-          REPO_LC=$(echo "${{ github.repository }}" | tr '[:upper:]' '[:lower:]')
-          echo "repo_lc=$REPO_LC" >> $GITHUB_OUTPUT
-          TAG="${{ github.ref_name }}"
-          echo "tag=$TAG" >> $GITHUB_OUTPUT
+      # GHCR needs lowercase owner (your account is KyleSDeveloper)
+      - name: Lowercase owner
+        run: echo "OWNER_LC=${GITHUB_REPOSITORY_OWNER,,}" >> $GITHUB_ENV
 
       - name: Login to GHCR
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
-          username: ${{ github.actor }}
+          username: ${{ env.OWNER_LC }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Set up Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Build & Push (GHCR)
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          push: true
-          tags: |
-            ghcr.io/${{ steps.prep.outputs.repo_lc }}:${{ steps.prep.outputs.tag }}
-            ghcr.io/${{ steps.prep.outputs.repo_lc }}:latest
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-
-  dockerhub:
-    if: ${{ secrets.DOCKERHUB_USERNAME != '' && secrets.DOCKERHUB_TOKEN != '' }}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Prep tag
-        id: prep
-        run: echo "tag=${{ github.ref_name }}" >> $GITHUB_OUTPUT
-
-      - name: Login to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Build & Push (Docker Hub)
-        uses: docker/build-push-action@v6
+      - name: Build & push
+        uses: docker/build-push-action@v5
         with:
           context: .
           push: true
           tags: |
-            ${{ secrets.DOCKERHUB_USERNAME }}/serving-app:${{ steps.prep.outputs.tag }}
-            ${{ secrets.DOCKERHUB_USERNAME }}/serving-app:latest
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+            ghcr.io/${{ env.OWNER_LC }}/serving_app:${{ github.ref_name }}
+            ghcr.io/${{ env.OWNER_LC }}/serving_app:latest