I have a pure API Spring Boot App with CORSFilter.
When I deploy the app on google app engine, the following screen comes:
However, the URL gives me this:
My complete project code is here at GitHUB.
The SMSService.java might give an error while compiling since I had to remove the AWS keys in order to make it public and they are asking me to take it down.
Try adding a url hadler to your app.yaml:
handlers:
- url: /.*
script: this field is required, but ignored
And, what directory are you deploying from? You have app.yamls in both of these:
/gcp
gcp/src/main/appengine/
Update:
In MainController.java, add a url handler for /:
public class MainController {
@RequestMapping("/")
public String home() {
return "Hello World!";
}