Need Quick Setup Work Done on DigitalOcean

I need quick help done to setup a droplet on DigitalOcean.

The droplet is already set up and was working under another domain name. Unfortunately we had to change domain names and now I am having trouble getting our app hosted on DigitalOcean to work.

The app we have was running on Redactor and Laravel. I seem to have everything set up on the host side, but the app itself is now not working.

I need this up and running ASAP.