help with spring-boot app

Summary:

My company currently has one compute instance running an Oracle Database and APEX application.
We want to build a REST service using spring-boot and Tomcat that our APEX application can call into.
This REST service running spring-boot will need to connect to an external SOAP api so it will need to make outbound calls to this secure SOAP api in which our IP address will need to be white listed.
This the spring-boot application will be relatively small and it doesn't need to handle very much traffic or have a lot of memory.

I would like some guidance on the best way to approach this if possible.