Centralizing spring boot logs(using almost anything)?

I work at big tech here in Bangladesh and I have a good prospect under my belt. The company yet doesn't has logs centralization. So, I was thinking of applying logs centralization.

Here is the current architecture:

- The application is hosted on kubernetes cluster.

- The logs by application(not of kubernetes) are emitted to a volume mount that the pod is currently running on.

- For example, there are 2 different nodes. Microservice A is emitting logs to node1 when it's running on node1. Similarly, vice-versa.

- Now, I want to keep those logs at one place.

- ELK stack caught my attention.

- I googled a lot but having a tough time to find anything useful information.

What I want?

A Curated guide that:

- gives me a sample java app that emits logs

- and helps to centralize it as shown in scenario above.

I prefer manual installations over command line than docker containers but anything is fine for me.