add declare as optional

Author: Buuh2511

docs/quick-start/environment.mdx

@@ -19,7 +19,33 @@ yarn chain
 
 This command starts a local Starknet network using Devnet. The network runs on your local machine and can be used for testing and development. You can customize the network configuration in `scaffold.config.ts`.
 
-### 2. Deploy your smart contract:
+### 2. Declare your smart contract (optional):
+
+Following an example at `deploy.ts`:
+
+```typescript
+const declareScript = async (): Promise<void> => {
+  const response = await declareContract({
+    contract: "YourContractName",
+    options: {}, // You can add options like maxFee, nonce if needed
+  });
+};
+```
+
+After setup function at `deploy.ts` run the command :
+
+```
+yarn deploy --network {NETWORK_NAME}
+```
+
+Pay attention to the output in the terminal. The ClassHash will be displayed during the deploy contract process.
+
+```
+Declaring Contract YourContractName
+Contract Declared at 0x00...
+```
+
+### 3. Deploy your smart contract:
 
 In the second terminal, deploy the test contract:
 
@@ -43,7 +69,7 @@ yarn deploy:no-reset
 
 :::
 
-### 3. Launch your NextJS Application
+### 4. Launch your NextJS Application
 
 On a third terminal, start your NextJS app: