Merge branch 'master' into dev

.gitlab-ci.yml

@@ -6,6 +6,6 @@ stages:
 build:
   stage: build
   script:
-    - npm install --global yarn
+    - npm install --force --global yarn
     - yarn install
     - yarn build

README.md

@@ -38,7 +38,13 @@ yarn run
 ```
 
 ## Useful resources
+[Typescript documentation react](https://www.typescriptlang.org/docs/handbook/react.html)
+
+[MDN](https://developer.mozilla.org/en-US/)
+
+[Documentazione material ui: framework css utilizzato](https://material-ui.com/)
 
-[react calendar app](https://codesandbox.io/s/kkyvoj97pv?from-embed=&file=/src/index.js)
 [codesandbox, utile per vedere altri progetti creati con framework](https://codesandbox.io/)
-[awesome css list](https://github.com/awesome-css-group/awesome-css)
+
+[react calendar app](https://codesandbox.io/s/kkyvoj97pv?from-embed=&file=/src/index.js)
+