__I am learning to code. My tutor taught me how to create an HTTP server using Express, and the same evening he gave me a task — build a basic TODO app using that knowledge. My first thought was — "Is that even possible with this little knowledge?" The answer, as it turns out, is yes. Completely yes. Here is everything I learned, explained the way I wish someone had explained it to me. First, What Even Is a Backend? Before I wrote a single line of code, I had to understand what a backend actually does. Think about a restaurant. You sit down. A waiter comes. You say — "Get me a burger." The waiter goes to the kitchen, gets it, and brings it back. Now map that to the internet — You are the browser The waiter is Express The kitchen is your backend logic The burger is the data When you type a URL in your browser and hit enter, you are placing an order. The server's job is to take that order, do something, and bring back a response. That's it. That's the entire internet in one analogy.…