#hello_world.js starts a server and listens #port 8081 and reponds with 'Hello World when connected
#basic_routing.js responds to a client request
#server_static_files.js serves static files dierctly like images
#inside "public_get" folder are the index.htm file and get_method.js passes two values using html form GET method
#inside "public_post" folder are the index.htm file and post_method.js passes two values using html form POST method
#file upload enables to upload files to the server
#cookie management prints client cookie data