Uh... no.
Ruby on Rails runs off a ruby webserver. Flask has its own built in webserver, web.py has its own built in webserver. Tho these are not languages, rather frameworks, (and in the case of web.py, a library), they have built in webservers
My point? These things came way before node.js, so no, node.js isn't the only one with a built in webserver.
The difference is node.js has a rather performant built in webserver (still, exeperience shows that a properly tuned gevent or netty beats a properly tuned node.js). The idea is that instead of spending time tuning these things, you can just wrap it in a uWSGI container, and let better tuned-out-of-the-box servers like nginx handle the webserving
My point? These things came way before node.js, so no, node.js isn't the only one with a built in webserver.
The difference is node.js has a rather performant built in webserver (still, exeperience shows that a properly tuned gevent or netty beats a properly tuned node.js). The idea is that instead of spending time tuning these things, you can just wrap it in a uWSGI container, and let better tuned-out-of-the-box servers like nginx handle the webserving