Build master image nightly

.github/workflows/publish-solr-master.yml

@@ -0,0 +1,29 @@
+name: Build and publish the master ckan-solr image
+on:
+  schedule:
+    - cron: '15 5 * * *'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build ckan-solr master
+        uses: docker/build-push-action@v3
+        with:
+          context: solr-8
+          file: solr-8/Dockerfile
+          build-args: |
+            CKAN_BRANCH=master
+          push: true
+          tags: |
+            ckan/ckan-solr:master
+

README.md

@@ -17,7 +17,7 @@ The following versions are available as different image tags:
 | 2.9 | Solr 8 | `ckan/ckan-solr:2.9-solr8-spatial` | Contains fields needed for the [ckanext-spatial](https://docs.ckan.org/projects/ckanext-spatial/en/latest/spatial-search.html) geo search |
 | 2.10 | Solr 8 | `ckan/ckan-solr:2.10` | |
 | 2.10 | Solr 8 | `ckan/ckan-solr:2.10-spatial` | Contains fields needed for the [ckanext-spatial](https://docs.ckan.org/projects/ckanext-spatial/en/latest/spatial-search.html) geo search |
-| master | Solr 8 | `ckan/ckan-solr:master` | The `master` image is not automatically updated and might be out of date |
+| master | Solr 8 | `ckan/ckan-solr:master` | The `master` image is built nightly |
 
 The following tags are no longer supported: