Add basic webserver skeleton with healthcheck

internal/server/http.go

@@ -0,0 +1,33 @@
+package server
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func (s *Server) serveUntilShutdown() {
+	listenAddr := fmt.Sprintf(":%d", s.config.Port)
+	s.httpServer = &http.Server{
+		Addr:           listenAddr,
+		ReadTimeout:    30 * time.Second,
+		WriteTimeout:   60 * time.Second,
+		MaxHeaderBytes: 1 << 13, // 8KB
+		Handler:        s,
+	}
+
+	s.SetupRoutes()
+
+	s.log.Info("http begin listen", "listenaddr", listenAddr)
+	if err := s.httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+		s.log.Error("listen error", "error", err)
+		if s.cancelFunc != nil {
+			s.cancelFunc()
+		}
+	}
+}
+
+// ServeHTTP implements http.Handler.
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	s.router.ServeHTTP(w, r)
+}