Update README.md

Author: atvanek

README.md

@@ -122,7 +122,7 @@ npm run start
 
 ## Stack
 
-Typescript, React.js, Redux, Javascript, D3.js, Node.js (Express), HTML, CSS/SASS, GraphQL, Next.js, Gatsby.js, Electron, SQL, NoSQL, Webpack, TDD (Jest, Enzyme and React Testing Library), OAuth 2.0, Travis CI
+Typescript, React.js, Redux Toolkit, Javascript, ESM, Node.js (Express), HTML, CSS, MUI, GraphQL, Next.js, Gatsby.js, Electron, NoSQL, Webpack, TDD (Jest, React Testing Library, Playwright), OAuth 2.0, Websocket, Continuous Integration (Github Actions), Docker, AWS (ECR, Elastic Beanstalk), Ace Editor, Google Charts, React DnD
 
 ## Contributions