message: node12->14: fix INSTALLATION.md
diff: git clone https://github.com/swaponline/MultiCurrencyWallet.git
  ```
  -3. Use Node 12
  +3. Use Node 14
  (For change Node version on Linux use [nvm](https://github.com/nvm-sh/nvm#installing-and-updating))
  (For Windows use [nvm for Windows](https://github.com/coreybutler/nvm-windows))
  ```
  -nvm install 12
  -nvm alias default 12
  -nvm use 12
  +nvm install 14
  +nvm alias default 14
  +nvm use 14
  ```
  4. Install modules
  