docs: add readme

README.md

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+# SUI Faucet Claim
+
+*It is a bot written in goling which automatically claims your faucet every 6 hours.*
+
+## Setup
+
+### Requirements
+
+- [Golang](https://go.dev/doc/install)
+
+Copy the `.env.example` file and rename it to `.env`. Fill the variables with your own values.
+
+Don't forget to put `,` between the wallets.
+
+```env
+WALLET=wallet1,wallet2,etc
+```
+
+## Run
+
+### Run with go
+
+```bash
+go run .
+```
+
+### Build windows
+
+```bash
+GOOS=windows GOARCH=amd64 go build -o suifaucet.exe .
+```
+
+### Build linux
+
+```bash
+GOOS=linux GOARCH=amd64 go build -o suifaucet .
+```
+
+### Build mac
+
+```bash
+GOOS=darwin GOARCH=amd64 go build -o suifaucet .
+```