Publish to GHCR only; remove DockerHub logins

Simplify CI container publishing by targeting only GitHub Container Registry. The docker/metadata-action images inputs for meta, meta-hw and meta-rk jobs were changed to ghcr.io/${{ github.repository }} (removing DockerHub image entries). DockerHub login steps were removed, and the GHCR login now runs for all non-pull_request events (if: github.event_name != 'pull_request'). Changes are in .github/workflows/build.yml to avoid pushing to DockerHub and ensure GHCR auth runs on appropriate events.

.github/workflows/build.yml

@@ -123,9 +123,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: |
+          images: ghcr.io/${{ github.repository }}
-            name=${{ github.repository }},enable=${{ github.event.repository.fork == false }}
-            ghcr.io/${{ github.repository }}
           tags: |
             type=ref,event=branch
             type=semver,pattern={{version}},enable=false
@@ -137,15 +135,8 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Login to DockerHub
-        if: github.event_name == 'push' && github.event.repository.fork == false
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
       - name: Login to GitHub Container Registry
-        if: github.event_name == 'push'
+        if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
@@ -180,9 +171,7 @@ jobs:
         id: meta-hw
         uses: docker/metadata-action@v5
         with:
-          images: |
+          images: ghcr.io/${{ github.repository }}
-            name=${{ github.repository }},enable=${{ github.event.repository.fork == false }}
-            ghcr.io/${{ github.repository }}
           flavor: |
             suffix=-hardware,onlatest=true
             latest=auto
@@ -197,15 +186,8 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Login to DockerHub
-        if: github.event_name == 'push' && github.event.repository.fork == false
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
       - name: Login to GitHub Container Registry
-        if: github.event_name == 'push'
+        if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
@@ -235,9 +217,7 @@ jobs:
         id: meta-rk
         uses: docker/metadata-action@v5
         with:
-          images: |
+          images: ghcr.io/${{ github.repository }}
-            name=${{ github.repository }},enable=${{ github.event.repository.fork == false }}
-            ghcr.io/${{ github.repository }}
           flavor: |
             suffix=-rockchip,onlatest=true
             latest=auto
@@ -252,15 +232,8 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Login to DockerHub
-        if: github.event_name == 'push' && github.event.repository.fork == false
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
       - name: Login to GitHub Container Registry
-        if: github.event_name == 'push'
+        if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           registry: ghcr.io