How can I host a separate landing/web page alongside my meteor app on the same droplet?

Hello, I am very new to digital ocean and hosting as a whole and would like some advice here.

I have so far successfully deployed a meteor app to my droplet and assigned a domain name (app.example.com) and that works perfectly. However I would like to know how, if possible, I can host a landing/web page for my app on the same droplet that can be accessed from example.com. (The idea is to have a simple web page that links visitors to the app store to download the app, but they can also proceed to app.example.com for the web version.)

I know I might have to use something like Apache and do a virtual host etc. but the real question is; how do I assign an A Record to my domain that links to the landing page (example.com) and assign a different A Record that links to the app (app.example.com)?

Since droplets only have a single IP, is that at all possible? Or is there another way to go about doing this.

Thanks in advance to anyone who might be of help!