1package main
 2
 3import (
 4	"log"
 5	"net/http"
 6)
 7
 8func main() {
 9	// Initialize a new servemux (router) - this stores the mapping between
10	// URL patterns and their corresponding handlers.
11	mux := http.NewServeMux()
12
13	// Register handlers for buylater.email routes
14	mux.HandleFunc("GET /{$}", home)                         // Exact match for home page
15	mux.HandleFunc("GET /submit", submitForm)                // Display email submission form
16	mux.HandleFunc("POST /submit", processSubmit)            // Process form submission
17	mux.HandleFunc("GET /confirm/{token}", confirmWithToken) // Magic link confirmation with token
18	mux.HandleFunc("GET /about", about)                      // About page
19
20	// Print a log message to indicate the server is starting.
21	log.Printf("Starting server on http://localhost:4000")
22
23	// Start the web server on port 4000. If ListenAndServe returns an error
24	// we use log.Fatal() to log the error and terminate the program.
25	err := http.ListenAndServe(":4000", mux)
26	log.Fatal(err)
27}