Deployment to GCP App Engine, but not serving Server Side Rendered pages

I am trying to deploy an Angular 7 Universal application to Google Cloud Platform, App Engine. Deployment is successful, but it seems there is no Server Side Rendering happening, only client side.

Building, and running a server work fine locally. When I request the page in the browser, I can see Express / Angular rendering page on the local server, tag and all other content is served directly.

When I deploy to the server and request the page, I only see a minimal html returned (<app-root></app-root>) which shows me there is no SSR happening. Application otherwise works well.

My folder structure looks like this:

dist/

  - browser/
    - index.html
    - other js / css / assets

  - server/
    - main.js

  - server.js

package.json

"scripts": {
    ...
    "start": "node dist/server.js",

app.yaml

runtime: nodejs10

handlers:
# Routing for bundles to serve directly
- url: /((?:runtime|main|polyfills|styles|vendor)\.[a-z0-9]+\.js)
  #secure: always
  redirect_http_response_code: 301
  static_files: dist/browser/\1
  upload: dist/browser/.*

# Routing for bundle maps to serve directly
- url: /((?:runtime|main|polyfills|styles|vendor)\.[a-z0-9]+\.js\.map)
  #secure: always
  redirect_http_response_code: 301
  static_files: dist/browser/\1
  upload: dist/browser/.*

# Routing for a prod styles.bundle.css to serve directly
- url: /(styles\.[a-z0-9]+\.css)
  #secure: always
  redirect_http_response_code: 301
  static_files: dist/browser/\1
  upload: dist/browser/.*

# Routing for typedoc, assets, and favicon.ico to serve directly
- url: /((?:assets|docs)/.*|favicon\.ico)
  #secure: always
  redirect_http_response_code: 301
  static_files: dist/browser/\1
  upload: dist/browser/.*

# Any other requests are routed to index.html for angular to handle so we don't need hash URLs
- url: /.*
  #secure: always
  redirect_http_response_code: 301
  static_files: dist/browser/index.html
  upload: dist/browser/index\.html
  http_headers:
    Strict-Transport-Security: max-age=31536000; includeSubDomains
    X-Frame-Options: DENY

- url: /
  static_dir: dist/

If it helps, here is a screenshot of Debug View of current files uploaded to GCP.

Where is this discrepancy between running the server happening?