update local dev mode instruction

Author: tmokmss

cdk/lib/constructs/auth/index.ts

@@ -115,6 +115,7 @@ export class Auth extends Construct {
 
     new CfnOutput(this, 'UserPoolId', { value: userPool.userPoolId });
     new CfnOutput(this, 'UserPoolClientId', { value: client.userPoolClientId });
+    new CfnOutput(this, 'UserPoolDomainName', { value: this.domainName });
   }
 
   public addAllowedCallbackUrls(callbackUrl: string, logoutUrl: string) {

cdk/test/__snapshots__/serverless-fullstack-webapp-starter-kit-without-domain.test.ts.snap

@@ -231,6 +231,22 @@ Object {
         "Ref": "AuthUserPoolClientC635291F",
       },
     },
+    "AuthUserPoolDomainName8D4A2606": Object {
+      "Value": Object {
+        "Fn::Join": Array [
+          "",
+          Array [
+            Object {
+              "Fn::GetAtt": Array [
+                "AuthDomainPrefixE1742B23",
+                "generated",
+              ],
+            },
+            ".auth.us-west-2.amazoncognito.com",
+          ],
+        ],
+      },
+    },
     "AuthUserPoolIdC0605E59": Object {
       "Value": Object {
         "Ref": "AuthUserPool8115E87F",

cdk/test/__snapshots__/serverless-fullstack-webapp-starter-kit.test.ts.snap

@@ -278,6 +278,9 @@ Object {
         "Ref": "AuthUserPoolClientC635291F",
       },
     },
+    "AuthUserPoolDomainName8D4A2606": Object {
+      "Value": "auth.example.com",
+    },
     "AuthUserPoolIdC0605E59": Object {
       "Value": Object {
         "Ref": "AuthUserPool8115E87F",

webapp/README.md

@@ -1,10 +1,21 @@
 This is a [Next.js](https://nextjs.org) project bootstrapped with [`create-next-app`](https://nextjs.org/docs/app/api-reference/cli/create-next-app).
 
-## Getting Started
+## Run locally
 
 First, run the development server:
 
 ```bash
+# Run this command in the repository root
+docker compose up -d
+cd webapp
+
+# Run this command in the webapp directory
+npx prisma db push
+cp .env.local.example .env.local
+code .env.local
+# Then populate values in .env.local
+
+# run the next.js server
 npm run dev
 ```