go get github.com/vladimirok5959/golang-server-bootstrap

package main

import (
	"context"
	"net/http"
	"time"

	"github.com/vladimirok5959/golang-server-bootstrap/bootstrap"
)

func main() {
	// Before callback
	before := func(
		ctx context.Context,
		w http.ResponseWriter,
		r *http.Request,
		o *[]bootstrap.Iface,
	) {
		w.Header().Set("Cache-Control", "public, max-age=31536000")
	}

	// After callback
	after := func(
		ctx context.Context,
		w http.ResponseWriter,
		r *http.Request,
		o *[]bootstrap.Iface,
	) {
		w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
		w.Header().Set("Content-Type", "text/html")
		w.Write([]byte(`
			<div>Hello World!</div>
			<div><a href="/assets/bootstrap.css">/assets/bootstrap.css</a></div>
			<div><a href="/assets/bootstrap.js">/assets/bootstrap.js</a></div>
			<div><a href="/assets/jquery.js">/assets/jquery.js</a></div>
			<div><a href="/assets/popper.js">/assets/popper.js</a></div>
		`))
	}

	// Start
	bootstrap.Start(
		&bootstrap.Opts{
			Host:    "127.0.0.1:8080",
			Path:    "assets",
			Before:  before,
			After:   after,
			Timeout: 8 * time.Second,
		},
	)
}

type Iface interface{}

type BeforeAfter func(
	ctx context.Context,
	w http.ResponseWriter,
	r *http.Request,
	o *[]Iface,
)

func Start(opts *bootstrap.Opts)