Go to https://cloud.digitalocean.com/apps, click on your app, and click on the Deployments tab. Here you can view the history of deployment activity for your app, as well as the real-time logs of an active deployment, by clicking the Details link for any deployment event you'd like to investigate.
You can also manually redeploy your app at any time by clicking the Deploy button on the top-right. This will pull the latest code from the component's associated source repo and run a build and deploy process.
The deployment marked as “Active” is the one currently being served at the live URL for your app.