Go autocert HTTPS web server

Making "production ready" web serve in GoLang takes a few lines of code only.

Making "secure" web server with HTTPS is just a few more lines of code.
That requires providing TLS cert keys.

Even obtaining free cert keys is possible by using "autocert" go package.
with "Let's Encrypt" free certs provider.

ssl - How to set up Let's Encrypt for a Go server application - Stack Overflow

Early renewal with autocert - Help - Let's Encrypt Community Support

autocert package - golang.org/x/crypto/acme/autocert - Go Packages

basic, configurable, Go files web server

go run server.go

go run server.go -dir=/path/to/your/files

go run server.go -port=3000

go run server.go -dir=/path/to/your/files -port=3000

package main

import (

    "flag"

    "fmt"

    "net/http"

    "os"

)

func main() {

    // Define command line flags

    dirPath := flag.String("dir", ".", "Directory path to serve files from")

    port := flag.String("port", "8080", "Port to run the server on")

    // Parse command line arguments

    flag.Parse()

    // Use specified directory

    staticDir := *dirPath

    // Verify the directory exists

    if _, err := os.Stat(staticDir); os.IsNotExist(err) {

        fmt.Printf("Error: Directory '%s' does not exist\n", staticDir)

        os.Exit(1)

    }

    // Create a file server handler for the specified directory

    fileServer := http.FileServer(http.Dir(staticDir))

    // Handle all requests by trying to serve a file

    http.Handle("/", fileServer)

    // Format the address with the port

    addr := ":" + *port

    // Start the server

    fmt.Printf("Server starting on port %s...\n", *port)

    fmt.Printf("Serving files from: %s\n", staticDir)

    fmt.Printf("Access at http://localhost%s\n", addr)

    err := http.ListenAndServe(addr, nil)

    if err != nil {

        fmt.Printf("Error starting server: %s\n", err)

    }

}

How To Make an HTTP Server in Go | DigitalOcean