Hi,
Can you elaborate more on what you mean by triggering a Mendix app?
Based on my assumption:
Scenario 1:
Based on the Title "Starting the app": More of a deployment view: Mendix has APIs to build your package, deploy, etc., which you can find from the Mendix documentation
Example: Simple CI/CD pipeline Using Mendix API
Documentation : https://docs.mendix.com/apidocs-mxsdk/apidocs/build-api/
https://docs.mendix.com/apidocs-mxsdk/apidocs/deploy-api/
https://docs.mendix.com/apidocs-mxsdk/apidocs/team-server-api/
Scenario 2 :
Want to trigger a microflow of business logic like clicking a link on the email to approve the request by redirecting to Mendix application and displaying a page to approve/reject?
You could make use of the Deeplink Module to achieve this.
Hope this helps !!