add the action to update openapi definition

.github/workflows/ci.yaml

@@ -46,7 +46,6 @@ jobs:
           sudo apt-get autoclean -y >/dev/null 2>&1
           echo "some packages purged"
 
-
       - uses: DeterminateSystems/nix-installer-action@main
         name: Install Nix
 
@@ -65,13 +64,33 @@ jobs:
 
       - name: Run integration tests
         run: nix run .#\integration-tests
-        
+
       - name: What GHC version?
         run: nix develop -c ghc --version
 
+  update-openapi-file:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: DeterminateSystems/nix-installer-action@main
+        name: Install Nix
+
+      - name: Generate OpenAPI file
+        run: nix run .#server gen-openapi > templatespiler-server/openapi.json
+
+      - name: Commit OpenAPI file
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: "chore: update openapi file"
+
   build-docker:
     runs-on: ubuntu-latest
-    needs: build
+    needs: [build, update-openapi-file]
     permissions:
       contents: read
       packages: write