fix: improve CI workflows and README documentation

.gitea/workflows/dependency-updates.yml

@@ -13,7 +13,6 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          token: ${{ secrets.CI_REGISTRY_TOKEN }}
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -39,20 +38,38 @@ jobs:
           cd backend/playout && go get -u ./... && go mod tidy
           cd ../chat && go get -u ./... && go mod tidy
 
-      - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v5
-        with:
-          token: ${{ secrets.CI_REGISTRY_TOKEN }}
-          commit-message: "chore: update dependencies"
-          title: "chore: weekly dependency updates"
-          body: |
-            Automated weekly dependency updates.
+      - name: Commit and push changes
+        run: |
+          git config user.name "linearvoid-bot"
+          git config user.email "bot@linearvoid.local"
+          git add frontend/package*.json backend/playout/go.* backend/chat/go.*
+          if git diff --cached --quiet; then
+            echo "No dependency changes detected."
+            exit 0
+          fi
+          git commit -m "chore: update dependencies"
+          git push origin HEAD:dependency-updates --force
 
-            This PR updates:
-            - Frontend npm dependencies
-            - Go module dependencies
-
-            Please review the changes and ensure tests pass before merging.
-          branch: dependency-updates
-          delete-branch: true
-          labels: dependencies, automated
+      - name: Create Pull Request via Gitea API
+        run: |
+          RESPONSE=$(curl -s -o /tmp/pr-response.json -w "%{http_code}" \
+            -X POST "$CI_SERVER_URL/api/v1/repos/zwitschi/linearvoid/pulls" \
+            -H "Authorization: token ${{ secrets.CI_REGISTRY_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            -d '{
+              "title": "chore: weekly dependency updates",
+              "head": "dependency-updates",
+              "base": "main",
+              "body": "Automated weekly dependency updates.\n\nThis PR updates:\n- Frontend npm dependencies\n- Go module dependencies\n\nPlease review the changes and ensure tests pass before merging."
+            }')
+          if [ "$RESPONSE" -eq 201 ]; then
+            PR_URL=$(cat /tmp/pr-response.json | jq -r '.html_url')
+            echo "PR created: $PR_URL"
+          elif [ "$RESPONSE" -eq 409 ]; then
+            echo "PR already exists. Pushing updated commits..."
+            git push origin dependency-updates --force
+          else
+            echo "Error creating PR (HTTP $RESPONSE):"
+            cat /tmp/pr-response.json
+            exit 1
+          fi