Backup the data and configuration information to an object store (AWS S3), use configuration management tools so you can programmatically provision a new server (dedicated or virtual, doesn't matter) in the event of failure. Provisioning should include functionality to deploy your application, and to restore your data to whatever data storage application (SQL, NoSQL, etc) you're using.
If you have questions, more than happy you provide free advice.
If you have questions, more than happy you provide free advice.