What methods can be used to implement the server side for a web application?

To implement the server-side of a web application in Go, several approaches can be used:

1. Standard library net/http — a simple and effective way to create an HTTP server without third-party dependencies.

package main
import (
    "fmt"
    "net/http"
)
func handler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, World!")
}
func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

2. Frameworks and routers — for more complex applications, you can use:
   • Gin
   • Echo
   • Fiber

They provide convenient routing, middleware, JSON handling, and much more.

3. gRPC — if you need to implement a high-performance API using the gRPC protocol.

4. Using microservice architecture — splitting the server part into separate services that interact with each other.

The choice depends on the project requirements, scalability, and team preferences.