Yes, you can use HTTP protocol for proxy configuration in Nginx. In fact, it's one of the most common use cases for Nginx.

To configure Nginx as a reverse proxy using HTTP protocol, you can use the proxy_pass directive in your Nginx configuration file. For example:

location / {
    proxy_pass http://example.com;
}

In this example, Nginx will proxy all requests to the example.com server using HTTP protocol.

You can also use a URL instead of an IP address for the proxy_pass directive. For example:

location / {
    proxy_pass http://example.com/path/to/your/app;
}

In this example, Nginx will proxy all requests to the example.com server and append the /path/to/your/app to the URL.

I hope that helps! Let me know if you have any further questions.