Lietuvos Bankas currency converter

todo more tests todo validate currencyPair size with spring validation todo db lock ForexService todo dockerize service todo exception messages for prop urls and else

Steps to start project in Linux:

1. install java 8 and node ^v16.13.2 with npm ^8.1.2
2. cd currency-converter
3. cd GUI
4. npm install
5. npm run linux
6. npm start
7. cd ..
8. java -jar backend.jar
9. open http://localhost:3000/ in browser

Steps to start project in Windows 10:

1. install java 8 and node ^v16.13.2 with npm ^8.1.2
2. cd currency-converter
3. cd GUI
4. npm install
5. npm run startWin
6. cd ..
7. java -jar backend.jar
8. open http://localhost:3000/ in browser