build: fix docker build - FIXME NEEDS TESTING REMOVED!

This switches the build from `ilteoood/docker_buildx` to
`docker/build-push-action`.

It also adds `workflow_dispatch:` so the actions can be tested more
easily.

Fixes #8062

.github/workflows/build_publish_beta_docker_image.yml

@@ -1,6 +1,7 @@
 name: Docker beta build
 
 on:
+    workflow_dispatch:
     push:
       branches:
         - master

.github/workflows/build_publish_release_docker_image.yml

@@ -1,6 +1,7 @@
 name: Docker release build
 
 on:
+  workflow_dispatch:
   release:
     types: [published]
 
@@ -32,15 +33,59 @@ jobs:
             - name: Get actual major version
               id: actual_major_version
               run: echo ::set-output name=ACTUAL_MAJOR_VERSION::$(echo $GITHUB_REF | cut -d / -f 3 | sed 's/v//g' | cut -d "." -f 1)
-            - name: Build and publish image
+            - name: Extract metadata (tags, labels) for Docker
-              uses: ilteoood/docker_buildx@1.1.0
+              id: meta
+              uses: docker/metadata-action@v5
               with:
-                tag: latest,${{ steps.actual_patch_version.outputs.ACTUAL_PATCH_VERSION }},${{ steps.actual_minor_version.outputs.ACTUAL_MINOR_VERSION }},${{ steps.actual_major_version.outputs.ACTUAL_MAJOR_VERSION }}
+                images: ghcr.io/${{ github.repository }}
-                imageName: rclone/rclone
+            - name: Set up QEMU
-                platform: linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6
+              uses: docker/setup-qemu-action@v3
-                publish: true
+            - name: Set up Docker Buildx
-                dockerHubUser: ${{ secrets.DOCKER_HUB_USER }}
+              uses: docker/setup-buildx-action@v3
-                dockerHubPassword: ${{ secrets.DOCKER_HUB_PASSWORD }}
+            - name: Login to GitHub Container Registry
+              uses: docker/login-action@v3
+              with:
+                registry: ghcr.io
+                # This is the user that triggered the Workflow. In this case, it will
+                # either be the user whom created the Release or manually triggered
+                # the workflow_dispatch.
+                username: ${{ github.actor }}
+                # `secrets.GITHUB_TOKEN` is a secret that's automatically generated by
+                # GitHub Actions at the start of a workflow run to identify the job.
+                # This is used to authenticate against GitHub Container Registry.
+                # See https://docs.github.com/en/actions/security-guides/automatic-token-authentication#about-the-github_token-secret
+                # for more detailed information.
+                password: ${{ secrets.GITHUB_TOKEN }}
+            - name: Show disk usage
+              shell: bash
+              run: |
+                df -h .
+            - name: Build and publish image
+              uses: docker/build-push-action@v6
+              with:
+                file: Dockerfile
+                context: .
+                push: true # push the image to ghcr
+                tags: |
+                  ghcr.io/rclone/rclone:TESTING-latest
+                  rclone/rclone:TESTING-latest
+                  ghcr.io/rclone/rclone:TESTING-${{ steps.actual_patch_version.outputs.ACTUAL_PATCH_VERSION }}
+                  rclone/rclone:TESTING-${{ steps.actual_patch_version.outputs.ACTUAL_PATCH_VERSION }}
+                  ghcr.io/rclone/rclone:TESTING-${{ steps.actual_minor_version.outputs.ACTUAL_MINOR_VERSION }}
+                  rclone/rclone:TESTING-${{ steps.actual_minor_version.outputs.ACTUAL_MINOR_VERSION }}
+                  ghcr.io/rclone/rclone:TESTING-${{ steps.actual_major_version.outputs.ACTUAL_MAJOR_VERSION }}
+                  rclone/rclone:TESTING-${{ steps.actual_major_version.outputs.ACTUAL_MAJOR_VERSION }}
+                labels: ${{ steps.meta.outputs.labels }}
+                platforms: linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6
+                cache-from: type=gha, scope=${{ github.workflow }}
+                cache-to: type=gha, mode=max, scope=${{ github.workflow }}
+                provenance: false
+              # Eventually cache will need to be cleared if builds more frequent than once a week
+              # https://github.com/docker/build-push-action/issues/252
+            - name: Show disk usage
+              shell: bash
+              run: |
+                df -h .
 
     build_docker_volume_plugin:
         if: github.repository == 'rclone/rclone'
@@ -73,5 +118,5 @@ jobs:
                     make docker-plugin PLUGIN_TAG=${PLUGIN_ARCH/\//-}
                     make docker-plugin PLUGIN_TAG=${PLUGIN_ARCH/\//-}-${VER#v}
                 done
-                make docker-plugin PLUGIN_ARCH=amd64 PLUGIN_TAG=latest
+                make docker-plugin PLUGIN_ARCH=amd64 PLUGIN_TAG=TESTING-latest
-                make docker-plugin PLUGIN_ARCH=amd64 PLUGIN_TAG=${VER#v}
+                make docker-plugin PLUGIN_ARCH=amd64 PLUGIN_TAG=TESTING-${VER#v}