Update README.md

README.md

-![GOKU API Gateway](https://camo.githubusercontent.com/f859a59b436a665a1551c2909393a91615344836/68747470733a2f2f646174612e656f6c696e6b65722e636f6d2f636f757273652f36486c4658786263323833333934376462666136383430626262613334383731346466626533333031386664366363 "GOKU API Gateway")
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