Add Playwright installation step in gen-og-images job and create jobs.json file

Author: csharpfritz

.github/workflows/build.yml

@@ -36,6 +36,7 @@ jobs:
         run: |
           cd scripts/genOGImages
           npm install
+          npx playwright install --with-deps
           npm run build
           node gen-opengraph-images.js
       - name: Upload files

jobs.json

@@ -0,0 +1 @@
+{"jobs":[]}