do not push private images to dockerhub anymore (#4447)

.github/workflows/build-private-images.yml

@@ -1,62 +0,0 @@
-name: Build Private Images
-
-on:
-  push:
-    branches: [master, stable]
-    tags: ['r*']
-  pull_request:
-    types: [synchronize, labeled]
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  build:
-    if: ${{ github.event_name == 'push' || contains(github.event.pull_request.labels.*.name, 'deploy-to-staging') }}
-    runs-on: buildjet-16vcpu-ubuntu-2204
-
-    steps:
-      - name: Docker meta
-        id: meta
-        uses: docker/metadata-action@v5.0.0
-        with:
-          images: plausible/analytics-private
-          tags: |
-            type=ref,event=pr
-            type=ref,event=branch
-            type=ref,event=tag
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Login to DockerHub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Build and push
-        id: docker_build
-        uses: docker/build-push-action@v6
-        with:
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          build-args: |
-            MIX_ENV=prod
-            BUILD_METADATA=${{ steps.meta.outputs.json }}
-
-      - name: Image digest
-        run: echo ${{ steps.docker_build.outputs.digest }}
-
-      - name: Notify team on failure
-        if: ${{ failure() }}
-        uses: fjogeleit/http-request-action@v1
-        with:
-          url: ${{ secrets.BUILD_NOTIFICATION_URL }}
-          method: 'POST'
-          customHeaders: '{"Content-Type": "application/json"}'
-          data: '{"content": "<a href=\"https://github.com/plausible/analytics/actions/workflows/build-private-images.yml\">Build failed</a>"}'