style(ct-base): rephrase container image tags IQSS#8932

As requested by review from @pdurbin, aligning image tag names.

.github/workflows/container_base_push.yml

@@ -20,7 +20,7 @@ on:
             - '.github/workflows/container_base_push.yml'
 
 env:
-    IMAGE_TAG: develop
+    IMAGE_TAG: unstable
     REGISTRY: docker.io
 
 jobs:
@@ -80,7 +80,7 @@ jobs:
               uses: docker/setup-qemu-action@v2
             - name: Re-set image tag based on branch
               if: ${{ github.ref_name == 'master' }}
-              run: echo "IMAGE_TAG=release"
+              run: echo "IMAGE_TAG=stable"
             - if: ${{ github.event_name != 'pull_request' }}
               name: Deploy multi-arch base container image to Docker Hub
               run: mvn -f modules/container-base -Pct deploy -Dbase.image.tag=${{ env.IMAGE_TAG }} -Ddocker.registry=${{ env.REGISTRY }}

doc/sphinx-guides/source/container/base-image.rst

@@ -22,12 +22,14 @@ efforts.
 Supported Image Tags
 ++++++++++++++++++++
 
-This image is sourced within the main upstream code repository of the Dataverse software. Development and maintenance
-happens there (again, by the community). Community supported image tags are based on the two most important branches:
+This image is sourced from the main upstream code `repository of the Dataverse software <https://github.com/IQSS/dataverse>`_.
+Development and maintenance of the `image's code <https://github.com/IQSS/dataverse/tree/develop/modules/container-base>`
+happens there (again, by the community). Community-supported image tags are based on the two most important
+upstream branches:
 
-- ``develop`` representing the unstable state of affairs in Dataverse's development branch
+- The ``unstable`` tag corresponds to the ``develop`` branch, where pull requests are merged.
   (`Dockerfile <https://github.com/IQSS/dataverse/tree/develop/modules/container-base/src/main/docker/Dockerfile>`__)
-- ``release`` representing the latest stable release in Dataverse's main branch
+- The ``stable`` tag corresponds to the ``master`` branch, where releases are cut from.
   (`Dockerfile <https://github.com/IQSS/dataverse/tree/master/modules/container-base/src/main/docker/Dockerfile>`__)
 
 

modules/container-base/README.md

@@ -29,12 +29,12 @@ https://dataversecommunity.slack.com to ask for help and guidance.
 ## Supported Image Tags
 
 This image is sourced within the main upstream code [repository of the Dataverse software](https://github.com/IQSS/dataverse).
-Development and maintenance happens there (again, by the community). Community-supported image tags are based on the two
-most important branches:
+Development and maintenance of the [image's code](https://github.com/IQSS/dataverse/tree/develop/modules/container-base)
+happens there (again, by the community). Community-supported image tags are based on the two most important branches:
 
-- `develop` representing the unstable state of affairs in Dataverse's development branch
+- The `unstable` tag corresponds to the `develop` branch, where pull requests are merged.
   ([`Dockerfile`](https://github.com/IQSS/dataverse/tree/develop/modules/container-base/src/main/docker/Dockerfile))
-- `release` representing the latest stable release in Dataverse's main branch
+- The `stable` tag corresponds to the `master` branch, where releases are cut from.
   ([`Dockerfile`](https://github.com/IQSS/dataverse/tree/master/modules/container-base/src/main/docker/Dockerfile))
 
 Within the main repository, you may find the base image files at `<git root>/modules/container-base`.

modules/container-base/pom.xml

@@ -40,7 +40,7 @@
             <properties>
                 <packaging.type>docker-build</packaging.type>
                 <base.image>gdcc/base:${base.image.tag}</base.image>
-                <base.image.tag>develop</base.image.tag>
+                <base.image.tag>unstable</base.image.tag>
                 <java.image>eclipse-temurin:${target.java.version}-jre</java.image>
                 <base.image.uid>1000</base.image.uid>
                 <base.image.gid>1000</base.image.gid>