Awesome-go: documentation review comments

[skovtunenko]

• Update README.md to add more details regarding hooks with the same Order -- what would be the effect?
• Reformat code snippets in README.md to be vertical-oriented instead of horizontal-oriented.
• In README.md, choose fewer indentation spaces.
• Fix code indentation in this line: // ..........
• Try to refactor this function into smaller ones:

  graterm/terminator.go

  Lines 118 to 176 in 9ba2fb9

  	func (t *Terminator) waitShutdown(appCtx context.Context) {
  	defer t.wg.Done()
  	<-appCtx.Done() // Block until application context is done (most likely, when the registered os.Signal will be received)
  	t.hooksMx.Lock()
  	defer t.hooksMx.Unlock()
  	order := make([]int, 0, len(t.hooks))
  	for k := range t.hooks {
  	order = append(order, int(k))
  	}
  	sort.Ints(order)
  	for _, o := range order {
  	o := o
  	runWg := sync.WaitGroup{}
  	for _, c := range t.hooks[Order(o)] {
  	runWg.Add(1)
  	go func(f Hook) {
  	defer runWg.Done()
  	ctx, cancel := context.WithTimeout(context.Background(), f.timeout)
  	defer cancel()
  	var execDuration time.Duration
  	go func() {
  	currentTime := time.Now()
  	defer func() {
  	defer cancel()
  	execDuration = time.Since(currentTime)
  	if err := recover(); err != nil {
  	t.log.Printf("registered hook panicked after %v for %v, recovered: %+v", execDuration, &f, err)
  	}
  	}()
  	f.hookFunc(ctx)
  	}()
  	<-ctx.Done() // block until the hookFunc is over OR timeout has been expired
  	switch err := ctx.Err(); {
  	case errors.Is(err, context.DeadlineExceeded):
  	t.log.Printf("registered hook timed out after %v for %v", f.timeout, &f)
  	case errors.Is(err, context.Canceled):
  	t.log.Printf("registered hook finished termination in %v (out of maximum %v) for %v", execDuration, f.timeout, &f)
  	}
  	}(c)
  	}
  	runWg.Wait()
  	}
  	}

• In "Integration with HTTP server" doc section, fix indentation for ReadHeaderTimeout
• Remove HTTP server config to address Slowris attack (it is unnecessary details)
• Add "AwesomeGo" label to the repo.

[skovtunenko]

Add "Awesome Go" label to the repo: #86

[skovtunenko]

Remove HTTP server config to address Slowris attack (it is unnecessary details): #87