HTTP2 Push feature with Nginx explained here
https://www.nginx.com/blog/nginx-1-13-9-http2-server-push/

Some further interesting Nginx Webcast

NGINX: Access Management and Security Controls – EMEA
https://www.nginx.com/resources/webinars/nginx-access-management-security-controls-emea/
MRA AMA Part 8: Secure Inter-Service Communication
https://www.nginx.com/watch-on-demand/?id=microservices-secure-inter-service-communication

Some further nice advices for managing your config files and your app states across different devices

Config with NodeJS
https://medium.com/ibm-watson-data-lab/environment-variables-or-keeping-your-secrets-secret-in-a-node-js-app-99019dfff716

Local Data and App State Management with CouchDB
https://medium.com/ibm-watson-data-lab/cloudant-couchdb-pouchdb-local-documents-b8cef869f9bd