Return message at root for api service in starter template (#12408)

* Return message at root for api service in starter template

Fixes #12405

* Update Python starter template

* Update src/Aspire.ProjectTemplates/templates/aspire-py-starter/13.0/app/app.py

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>

---------

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>

Author: 2 people

src/Aspire.ProjectTemplates/templates/aspire-py-starter/13.0/app/app.py

@@ -59,6 +59,12 @@ def get_redis_client():
 logger = logging.getLogger(__name__)
 
 
+if not os.path.exists("static"):
+    @app.get("/")
+    async def root():
+        """Root endpoint."""
+        return "API service is running. Navigate to /weatherforecast to see sample data."
+
 @app.get("/api/weatherforecast")
 //#if UseRedisCache
 async def weather_forecast(redis_client=fastapi.Depends(get_redis_client)):

src/Aspire.ProjectTemplates/templates/aspire-starter/13.0/Aspire-StarterApplication.1.ApiService/Program.cs

@@ -25,6 +25,8 @@
 #endif
 string[] summaries = ["Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"];
 
+app.MapGet("/", () => "API service is running. Navigate to /weatherforecast to see sample data.");
+
 app.MapGet("/weatherforecast", () =>
 {
     var forecast = Enumerable.Range(1, 5).Select(index =>