Simplify push-to-branch step

.drone.yml

@@ -47,14 +47,11 @@ steps:
   - name: push-to-branch
     image: alpine/git
     commands:
-      # Set up the gh-pages branch
-      - git fetch origin gh-pages || echo "gh-pages not found, will create it"
-      - git checkout gh-pages || git checkout -b gh-pages
-      # Copy new chart artifacts
-      - mkdir -p charts/dist
-      - cp -r $DRONE_WORKSPACE/charts/dist/* charts/dist/
-      # Commit changes
+      # Check if gh-pages exists remotely, fetch it if it does, otherwise create it
+      - git ls-remote --heads origin gh-pages | grep -q gh-pages && git fetch origin gh-pages && git checkout gh-pages || git checkout -b gh-pages
+      # Stage the charts/dist directory (already in the working directory)
       - git add charts/dist/*
+      # Commit changes
       - git commit -m "Update Helm charts from commit ${DRONE_COMMIT}" || echo "No changes to commit"
       # Push with API key in URL and check for failure
       - git push https://x:${GITEA_API_KEY}@git.interlegis.leg.br/seit/rancher-charts.git HEAD:gh-pages --force || { echo "Git push failed"; exit 1; }