docs: add faucet link

.dumirc.ts

@@ -169,6 +169,12 @@ export default defineConfig({
               url: 'https://github.com/WTFAcademy/WTF-Dapp',
               openExternal: true,
             },
+            {
+              title: 'Faucet',
+              description: 'Get testnet Sepolia ETH',
+              url: 'https://zan.top/faucet?chInfo=ch_antdweb3',
+              openExternal: true,
+            },
           ],
         },
         {
@@ -246,6 +252,12 @@ export default defineConfig({
               url: 'https://github.com/WTFAcademy/WTF-Dapp',
               openExternal: true,
             },
+            {
+              title: '测试网水龙头',
+              description: '获取测试网 Sepolia ETH',
+              url: 'https://zan.top/faucet?chInfo=ch_antdweb3',
+              openExternal: true,
+            },
           ],
         },
         {

docs/course/contract-compile-deploy.md

@@ -40,9 +40,9 @@ Click `ABI` to copy and export:
 
 ## Deploy
 
-Click `Deploy&Run` to send the transaction to the current `ENVIRONMENT`.
+Click `Deploy&Run` to send the transaction to the current `ENVIRONMENT`. Deploying contracts consumes GAS, even on the test network. GAS is paid with ETH from the test network, so you also need to obtain some ETH from the test network through the faucet. For example, you can get Sepolia test network ETH through the [ZAN test network faucet](https://zan.top/faucet?chInfo=ch_antdweb3).
 
-Next, we will try to deploy the contract to the Goerli testnet through MetaMask. Please switch your MetaMask to the Goerli testnet (of course, you can also switch to other testnets you are used to using).
+Next, we will try to deploy the contract to the Sepolia testnet through MetaMask. Please switch your MetaMask to the Sepolia testnet (of course, you can also switch to other testnets you are used to using).
 
 Click the drop-down box of `ENVIRONMENT`, you can see many options to choose from, we choose `Injected Provider - MetaMask`.
 

docs/course/contract-compile-deploy.zh-CN.md

@@ -39,9 +39,9 @@ order: 3
 
 ## 部署
 
-点击 `Deploy&Run` 可以将交易发送到当前的 `ENVIRONMENT` 中。
+点击 `Deploy&Run` 可以将交易发送到当前的 `ENVIRONMENT` 中。部署合约需要消耗 GAS，即便是测试网也是如此。GAS 通过测试网的 ETH 支付，所以你还需要通过水龙头获取一些测试网的 ETH。比如你可以通过 [ZAN 的测试网水龙头](https://zan.top/faucet?chInfo=ch_antdweb3)获取 Sepolia 测试网的 ETH。
 
-接下来我们尝试通过 MetaMask 部署合约到测试网 Goerli 中，请先将你的 MetaMask 切换到测试网 Goerli（当然你也可以切换到其它你习惯使用的测试网）。
+接下来我们尝试通过 MetaMask 部署合约到测试网 Sepolia 中，请先将你的 MetaMask 切换到测试网 Sepolia（当然你也可以切换到其它你习惯使用的测试网）。
 
 点击`ENVIRONMENT` 的下拉选择框，可以看到有许多的选项可供选择，我们选择 `Injected Provider - MetaMask`。
 

docs/course/contract-dapp.md

@@ -146,7 +146,7 @@ export default function Web3() {
 
 ```
 
-Switch to the Goerli testnet in the DApp page, and if you click the `mint` button, the MetaMask transaction confirmation pop-up window will be triggered if everything goes well:
+Switch to the Sepolia testnet in the DApp page, and if you click the `mint` button, the MetaMask transaction confirmation pop-up window will be triggered if everything goes well:
 
 ![](./img/mint-test-net.png)