Deploy contract from truffle to testnet

Truffle 設定新的 network
Geth 開啟 test net
Deploy!

In geth console
```
personal.unlockAccount(eth.accounts[0])
```

```sh
truffle migrate --network ropsten
```



```

module.exports = {
  networks: {
    development: {
      host: "localhost",
      port: 8545,
      network_id: "*" // Match any network id
    },
     ropsten:  {
     network_id: 3,
     host: "localhost",
     port:  8545,
     gas:   2900000

}
  },
   rpc: {
 host: 'localhost',
 post:8080
   }
};

```


https://medium.com/@guccimanepunk/how-to-deploy-a-truffle-contract-to-ropsten-e2fb817870c1