ci: Try to push to ghcr.io (#2051)

I don't think I can change where it's pushed and start using it in the
same PR, so will try to first update the push part, and then change
where the image is used. Only doing it for CI image to not break
anything.

.github/actions/build_docker_image/action.yml

@@ -1,8 +1,12 @@
 name: Build and push Docker image
 description: Build and push Docker image to DockerHub and GitHub Container Registry
+
 inputs:
-  image_name:
-    description: Name of the image to build
+  images:
+    description: Name of the images to use as a base name
+    required: true
+  dockerhub_repo:
+    description: DockerHub repository name
     required: true
   push_image:
     description: Whether to push the image to the registry (true/false)
@@ -19,6 +23,7 @@ inputs:
   description:
     description: Short description of the image
     required: true
+
 runs:
   using: composite
   steps:
@@ -45,7 +50,7 @@ runs:
     - uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 #v5.7.0
       id: meta
       with:
-        images: ${{ inputs.image_name }}
+        images: ${{ inputs.images }}
         tags: ${{ inputs.tags }}
 
     - name: Build and push
@@ -62,6 +67,6 @@ runs:
       with:
         username: ${{ env.DOCKERHUB_USER }}
         password: ${{ env.DOCKERHUB_PW }}
-        repository: ${{ inputs.image_name }}
+        repository: ${{ inputs.dockerhub_repo }}
         short-description: ${{ inputs.description }}
         readme-filepath: ${{ inputs.directory }}/README.md