nginx.conf

server {
  listen 80;

  # Remove nginx version from "Server" response header
  server_tokens off;

  # gzip
  # Minimal required
  gzip on;
  gzip_types text/plain text/css application/json application/javascript image/svg+xml;
  # Optional but Recommended Properties:
  gzip_comp_level 5;
  gzip_min_length 1024;
  gzip_proxied any;

  root /usr/share/nginx/html;
  index index.html;

  # Health check endpoint
  location /healthz {
    add_header Content-Type application/json;
    return 200 "{\"status\": \"OK\"}";
  }

  # API proxy
  location /api/ {
    proxy_pass https://jsonplaceholder.typicode.com/;
    proxy_ssl_server_name on;
  }

  # Explicitly prevent caching of index.html (https://stackoverflow.com/questions/40243633/disable-nginx-cache-for-javascript-files)
  location = /index.html {
    expires -1;
    etag off;
    add_header Cache-Control 'no-store, no-cache';
  }

  location / {
    try_files $uri $uri/ /index.html;
  }

  error_page 500 502 503 504 /50x.html;
}