add sponsor link and images

Author: developerfred

README.md

@@ -2,6 +2,8 @@
 
 Este projeto foi construindo para participar do [Bounty](https://github.com/Loopring/dexwebapp/issues/158)
 
+<img src="https://chat.gitcoin.co/files/uyqt91ykwfrkmnuomgii66qybo/public?h=ujfHczu5l41J9k59Qcw5hz1W6Eq42SSKUo4FiiqKL-E" width="300" height="600" />
+
 ## What is LoopringPay?
 We recently launched [Loopring Pay](https://loopring.org/#/post/loopring-pay-is-live-zkrollup-transfers-on-ethereum) - fast, free, and completely self-custodial ETH and ERC20 transfers on our zkRollup.
 
@@ -18,3 +20,6 @@ This template contains two packages:
 - [contracts](/packages/contracts)
 - [react-app](/packages/react-app)
 
+## Support My Work
+
+- [Gitcoin Grants](https://bit.ly/SupportMyCode)