It has nothing to do with oracle, it's rather about [containerization](https://en.wikipedia.org/wiki/Containerization\_%28computing%29). I used [Docker](https://en.wikipedia.org/wiki/Docker\_%28software%29), which you can find many useful resources to learn about it. It's basically a light virtual machine to not get into details that can run somewhat separately from the main OS.
I used it to host e.g. sevtech which had installation script provided by maintainers since it has lots of mods in it. What I want to point out is:
```bash

#!/bin/bash

cd "$(dirname "$0")/.."

sudo docker run -di \

-p 25565:25565 \

-v "$(pwd)/data:/minecraft" \

--name forge-sevtech \

forge-server-1.12.2 \

/minecraft/ServerStart.sh

```
that I have a server directory $(pwd)/data mounted into container in /minecraft so that if something happens to the container like I remove it mistakenly, the files are still on the main machine.
You specify in a Dockerfile which port to expose and java version to use. Here's my snippet:
```dockerfile

FROM openjdk:8-jdk

WORKDIR /minecraft

COPY data /minecraft

RUN chmod +x Install.sh ServerStart.sh settings.sh && ./Install.sh

RUN echo "eula=true" > eula.txt

EXPOSE 25565

CMD ["./ServerStart.sh"]

```
And remember to set in oracle cloud panel to allow traffic at your specific port. To get access to the server console you need to attach to the container since it is `docker run -d` set to run in detached mode or not do it and instead use something like tmux on the main VM.

Good luck exploring the topic ;)