add middlewares, handlers and database models

internal/handler/home.go

@@ -0,0 +1,14 @@
+package handler
+
+import "net/http"
+
+type homeHandler struct{}
+
+func NewHomeHandler() *homeHandler {
+	return &homeHandler{}
+}
+
+func (home *homeHandler) NotFoundPage(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusNotFound)
+	w.Write([]byte("404 Page Not Found"))
+}