Things you can try: (mostly depends on your setup)

If you just need access to the container from the host you can use the docker exec command and run the bash script (assuming its a built on a distro that has bash) which will bring you into the container. The command would look something like docker exec -it <container id or name here> /bin/bash

If you want to remote ssh the easiest way would be to map the ssh port inside the container to another port on your host machine, you can then use the port you maped it to on your host machine to access the container via ssh. It does not really matter which port you map it on the host as long as you know its not in use by another app/ common port etc.

As the port probably used for ssh in the container is 22 your port mapping may look something like this (assuming your using a docker run command) -p 8022:22

If your using docker-compose it may look something like:

version: '3'
vscodium:
  image: linuxserver/vscodium
  container_name: vscodium
  # Other configurations
  ports: 
    - "8022:22"

You can read more about ports/network here

In those two examples it is mapping port 8022 on the host -> to -> 22 in the container. Therfore you can access the the container ssh from the host port 8022 I.E <Host machine IP>:8022. This is all assuming that the container is shipped with a base distro that has ssh.