next-js-subdirectories

server {

  listen 80 default_server;
  listen [::]:80 default_server;

  server_name _;

  #ONE FOR EACH NEXTJS APP AND SUBDOMAIN

  #BIKES - PORT 3001
  location /bikes/_next/static {

    autoindex on;
    alias /home/ubuntu/bikes/.next/static;
  }

  location /bikes/api {

    proxy_pass http://localhost:3001/api;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;proxy_cache_bypass $http_upgrade;
  }

  location /bikes {

    proxy_pass http://localhost:3001;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
  }

  #CARS - PORT 3002
  location /cars/_next/static {

    autoindex on;
    alias /home/ubuntu/cars/.next/static;
  }

  location /cars/api {

    proxy_pass http://localhost:3002/api;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;proxy_cache_bypass $http_upgrade;
  }

  location /cars {

    proxy_pass http://localhost:3002;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
  }

  #TRUCKS - PORT 3003
  location /trucks/_next/static {

    autoindex on;
    alias /home/ubuntu/trucks/.next/static;
  }

  location /trucks/api {

    proxy_pass http://localhost:3003/api;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;proxy_cache_bypass $http_upgrade;
  }

  location /trucks {

    proxy_pass http://localhost:3003;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;
  }

}

What about static images from the NextJS?