Switch official environment publishing to Docker Hub

.github/workflows/publish-environments.yml

@@ -8,7 +8,6 @@ on:
 
 permissions:
   contents: read
-  packages: write
 
 concurrency:
   group: publish-environments-${{ github.ref }}
@@ -19,8 +18,8 @@ jobs:
     runs-on: ubuntu-24.04
     env:
       UV_CACHE_DIR: .uv-cache
-      OCI_REGISTRY_USERNAME: ${{ github.actor }}
-      OCI_REGISTRY_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
+      OCI_REGISTRY_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+      OCI_REGISTRY_PASSWORD: ${{ secrets.DOCKERHUB_TOKEN }}
     steps:
       - name: Check out source
         uses: actions/checkout@v4
@@ -42,5 +41,5 @@ jobs:
       - name: Build real runtime inputs
         run: make runtime-materialize
 
-      - name: Publish official environments to GHCR
+      - name: Publish official environments to Docker Hub
         run: make runtime-publish-official-environments-oci