ci: deploy through the restricted uiogaming-deploy script

The old workflow ran docker compose in the repo folder, which failed because the containers belong to the server's top-level compose project. The deploy key can now only run /usr/local/bin/uiogaming-deploy (see UiO-Gaming/drift), so the workflow just passes the service name. Also adds manual runs and prevents overlapping deploys.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -4,25 +4,29 @@ on:
   push:
     branches:
       - main
+  workflow_dispatch:
+
+# Never run two deploys of this repo at the same time
+concurrency: deploy
 
 jobs:
-  run_pull:
+  deploy:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
 
     steps:
       - name: Set up SSH
         run: |
           install -m 600 -D /dev/null ~/.ssh/id_ed25519
           echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_ed25519
-          chmod 600 ~/.ssh/id_ed25519  # This should be redundant but seems to do the trick.
           ssh-keyscan -H ${{ vars.SSH_HOST }} > ~/.ssh/known_hosts
 
-      - name: Connect, pull, build and deploy
-        run: ssh ${{ secrets.SSH_USER }}@${{ vars.SSH_HOST }} "cd ${{ secrets.WORK_DIR }} && git checkout ${{ vars.MAIN_BRANCH }} && git pull && docker compose down && docker compose up -d --build && exit"
+      # The deploy key can only run /usr/local/bin/uiogaming-deploy on the server. It takes the
+      # service name from the top-level docker-compose.yml (see drift/driftsdokumentasjon.md).
+      - name: Deploy
+        run: ssh ${{ secrets.SSH_USER }}@${{ vars.SSH_HOST }} bebbes
 
       - name: Clean up
+        if: always()
         run: rm -rf ~/.ssh
-
-    permissions:
-      contents: read
-      pull-requests: write