Adds CDK deployment instructions and updates region

Enhances the README with CDK deployment commands.

bin/web-stack.ts

@@ -8,7 +8,7 @@ const app = new cdk.App();
 new WebStack(app, 'SyncrowWebStack', {
   env: {
     account: process.env.CDK_DEFAULT_ACCOUNT,
-    region: process.env.CDK_DEFAULT_REGION || 'us-east-2',
+    region: 'me-central-1',
   },
   certificateArn: app.node.tryGetContext('certificateArn'),
 });