Merge branch 'master' into 'main'

.gitignore

README.md

kurssitiedot.zip

package-lock.json

package.json

public/favicon.ico

public/index.html

public/logo192.png

public/logo512.png

public/manifest.json

public/robots.txt

src/App-2-1.js

src/App-2-2.js

src/App-2-3.js

src/App-2-4.js

src/App-2-5.js

src/App.js

src/components/Course.js

src/index.js