ci: add generation step

TICKET: WP-6702

Author: danielzhao122

.github/workflows/ci.yml

@@ -402,7 +402,7 @@ jobs:
         run: yarn run postinstall
 
       - name: Install OpenAPI Generator at root
-        run: yarn add --dev -W @api-ts/openapi-generator@v5
+        run: yarn add -W @api-ts/openapi-generator@v5
 
       - name: Download and install vacuum v0.18.1
         run: |
@@ -417,6 +417,14 @@ jobs:
           sudo mv vacuum /usr/local/bin/
           vacuum version
 
+      - name: Generate API spec
+        working-directory: modules/express
+        run: |
+          ../../node_modules/.bin/openapi-generator \
+            --codec-file openapi-generator.rc.js \
+            src/typedRoutes/api/index.ts \
+            > api-generated.json
+
       - name: Audit with Vacuum
         working-directory: modules/express
         run: |