fix(express): Ensure we document error handler positioning (#10092)

Author: mydea

platform-includes/getting-started-add-top-level-import/javascript.express.mdx

@@ -8,7 +8,8 @@ const app = express();
 
 // Add your routes, etc.
 
-// Add this after all routes and other middlewares are defined
+// Add this after all routes,
+// but before any and other error-handling middlewares are defined
 Sentry.setupExpressErrorHandler(app);
 
 app.listen(3000);
@@ -24,7 +25,8 @@ const app = express();
 
 // Add your routes, etc.
 
-// Add this after all routes and other middlewares are defined
+// Add this after all routes,
+// but before any and other error-handling middlewares are defined
 Sentry.setupExpressErrorHandler(app);
 
 app.listen(3000);

platform-includes/getting-started-use/javascript.express.mdx

@@ -10,7 +10,8 @@ const app = express();
 
 // Add your routes, etc.
 
-// Add this after all routes and other middlewares are defined
+// Add this after all routes,
+// but before any and other error-handling middlewares are defined
 Sentry.setupExpressErrorHandler(app);
 
 app.listen(3000);
@@ -28,7 +29,8 @@ const app = express();
 
 // Add your routes, etc.
 
-// Add this after all routes and other middlewares are defined
+// Add this after all routes,
+// but before any and other error-handling middlewares are defined
 Sentry.setupExpressErrorHandler(app);
 
 app.listen(3000);

platform-includes/migration/javascript-v8/important-changes/javascript.express.mdx

@@ -18,7 +18,8 @@ const app = express();
 
 // Add routes etc. here
 
-// Add this after all routes and other middlewares are defined
+// Add this after all routes,
+// but before any and other error-handling middlewares are defined
 Sentry.setupExpressErrorHandler(app);
 
 app.listen(3000);
@@ -32,7 +33,8 @@ const app = express();
 
 // Add your routes, etc.
 
-// Add this after all routes and other middlewares are defined
+// Add this after all routes,
+// but before any and other error-handling middlewares are defined
 Sentry.setupExpressErrorHandler(app);
 
 app.listen(3000)