refactor minor

Author: tienbku

README.md

@@ -18,6 +18,8 @@ Fullstack with Node.js Express:
 Fullstack with Spring Boot:
 > [React.js + Spring Boot + MySQL](https://bezkoder.com/react-spring-boot-crud/)
 
+> [React.js + Spring Boot + PostgreSQL](https://bezkoder.com/spring-boot-react-postgresql/)
+
 > [React.js + Spring Boot + MongoDB](https://bezkoder.com/react-spring-boot-mongodb/)
 
 Fullstack with Django:

src/App.js

@@ -12,9 +12,9 @@ class App extends Component {
     return (
       <div>
         <nav className="navbar navbar-expand navbar-dark bg-dark">
-          <a href="/tutorials" className="navbar-brand">
+          <Link to={"/tutorials"} className="navbar-brand">
             bezKoder
-          </a>
+          </Link>
           <div className="navbar-nav mr-auto">
             <li className="nav-item">
               <Link to={"/tutorials"} className="nav-link">