Merge branch 'source' of github.com:fullstack-hy2020/fullstack-hy2020.github.io into source

Author: mluukkai

src/content/1/fi/osa1d.md

@@ -1091,13 +1091,11 @@ Huomaa, että sovelluksen tarvitsee toimia vain yhden selaimen käyttökerran aj
 Kannattaa noudattaa samaa rakennetta kuin materiaalissa ja edellisessä tehtävässä, eli tiedoston <i>index.js</i> sisältö on seuraava:
 
 ```js
-import ReactDOM from 'react-dom'
+import ReactDOM from 'react-dom/client'
 import App from './App'
 
-ReactDOM.render(
-  <App />, 
-  document.getElementById('root')
-)
+
+ReactDOM.createRoot(document.getElementById('root')).render(<App />)
 ```
 
 Muun sovelluksen voi tehdä tiedostoon <i>App.js</i>. Tiedoston sisältö voi olla aluksi seuraava:

src/content/8/fi/osa8e.md

@@ -193,7 +193,7 @@ const typeDefs = gql`
 module.exports = typeDefs
 ```
 
-Siirretään reducereiden määrittely tiedostoon <i>reducers.js</i>
+Siirretään resolverien määrittely tiedostoon <i>resolvers.js</i>
 
 ```js
 const { UserInputError, AuthenticationError } = require('apollo-server')

src/content/9/en/part9b.md

@@ -272,7 +272,7 @@ Sometimes, an npm package can also include its types within the code and, in tha
 
 Since the global variable <i>process</i> is defined by Node itself, we get its typings by from the package <i>@types/node</i>.
 
-Since version 10.0 <i>ts-node</i> has defined <i>@types/node</i> as a [peer rependency](https://docs.npmjs.com/cli/v8/configuring-npm/package-json#peerdependencies). If the version of npm is at least 7.0, the peer dependencies of a project automatically installed by then npm. If you have an older npm, the peer dependency must be installed explicitly:
+Since version 10.0 <i>ts-node</i> has defined <i>@types/node</i> as a [peer dependency](https://docs.npmjs.com/cli/v8/configuring-npm/package-json#peerdependencies). If the version of npm is at least 7.0, the peer dependencies of a project automatically installed by then npm. If you have an older npm, the peer dependency must be installed explicitly:
 
 
 ```shell