The web frontend
The changes needed in the frontend are minimal and constrained to the two service modules we create to wrap around the REST endpoints. We simply remove banking/ from the start of all the relative URLs. While this is not strictly necessary, it does remove the suggestion that there is some sort of hierarchy in place with the REST services – they are simply endpoints.
Now, you may be wondering, if we are going to deploy the Spring Boot applications potentially on separate hosts, but definitely as separate deployment units, how do those URLs relative to the host of our frontend get mapped to those backend services?
As you will see in the next section, we will be hosting the frontend in NGINX, which is a high-performance web server and reverse proxy. We will be making use of the reverse proxy's functionality to map those URLs to the actual URLs and proxy the requests. Precisely how this will be implemented will depend on which platform we chose for deployment...