add image of book cover
example of reading a file
basic http server
explicitly set event listener for http request
stream file to console
stream image from server to client
finish chapter 1
define application metadata and dependencies
ignore dependencies installed with
server variable declarations
send 404 for non existent files
helper to send file contents as HTTP response
add cache management function
define server
set listening port for server
fix typo
basic page layout
make the page look pretty
set up chat server to listen for websockets
handle connections in chat server