ci: provide generated image url as build image output

.gitea/workflows/build-image.yml

@@ -11,10 +11,17 @@ on:
       runner:
         required: true
         type: string
+    outputs:
+      image:
+        description: "full url of pushed image"
+        value: ${{ jobs.Build-Image.outputs.image-url }}
 
 jobs:
   Build-Image:
     runs-on: ["${{ inputs.runner }}"]
+    outputs:
+      image-url: ${{ steps.lcname.outputs.image-name }}
+
     steps:
       - run: echo "The job was automatically triggered by a ${{ gitea.event_name }} event."
       - run: echo "This job is now running on a ${{ runner.os }} server hosted by Gitea!"
@@ -30,3 +37,5 @@ jobs:
           REPOSITORY: '${{ gitea.repository }}'
       - run: podman build -t gitea.pena:3000/${{ env.REPOSITORY_LC }}/${{ gitea.ref_name }}:${{ gitea.run_id }} .
       - run: podman push gitea.pena:3000/${{ env.REPOSITORY_LC }}/${{ gitea.ref_name }}:${{ gitea.run_id }}
+      - id: lcname
+        run: echo "image-name=gitea.pena:3000/${{ env.REPOSITORY_LC }}/${{ gitea.ref_name }}:${{ gitea.run_id }}" >> $GITEA_OUTPUT