To allow this to work on your local machine, follow these steps:

1. Install nginx on your machine. For OSX users, you can run brew install nginx. If you don't have homebrew, you should install it.

2. After install, run: sudo nginx

3. Update the nginx configuration file in /usr/local/etc/nginx/nginx.conf with the following values in the http module.

server {
  listen                  80;
  listen                  443 ssl;
  ssl_certificate         /etc/ssl/certs/myssl.crt;
  ssl_certificate_key     /etc/ssl/private/myssl.key;
  server_name             myApp;

  # Backend Service
  location /local {
      proxy_pass  http://localhost:8000;
  }
  
  # Frontend
  location / {
      proxy_pass  http://localhost:3000/;
  }
}

3. Run sudo nginx -s stop and sudo nginx to update nginx with the new configurations.

4. Update your hosts file in /etc/hosts file with the following values.

127.0.0.1	    local.myapp.com

With Ubuntu, the setup is very similar to MacOS, but ever so slightly different.

1. Install nginx on your machine using sudo apt install nginx.

2. Create a new file for the reverse proxy at /etc/nginx/sites-available/reverse-proxy.conf with the contents from the MacOS section (step 2) above.

3. Create a symbolic link to the file in sites-enabled using sudo ln -s /etc/nginx/sites-available/reverse-proxy.conf /etc/nginx/sites-enabled/reverse-proxy.conf

4. Run sudo nginx -s stop and sudo nginx to update nginx with the new configurations.

5. Update your hosts file in /etc/hosts file with the following values from the MacOS section above (step 4).

To test https locally, run the script generate-self-signed-cert-locally.sh. Enter a passphrase, but don't worry about all the other details.

Then ensure you include the ssl_certificate and ssl_certificate_key values in your server definition within your nginx configuration file located at: /usr/local/etc/nginx/nginx.conf. It should look something like:

server {
    listen               443 ssl;
    ssl_certificate      /etc/ssl/certs/myssl.crt;
    ssl_certificate_key  /etc/ssl/private/myssl.key;
    server_name SERVER_NAME.com;
    location / {
    }
}