Multidrive access for Kubernetes Nodes - docker

Question

So, forgive me. I just started learning docker and kubernets a month ago.
I've got this to the point where I have my .yml file that takes my Minecraft server and runs it. I now want ftp access. Currently, there's a drive for the world folder and the config folder for the server (since I can't put the entire directory on a mounted drive (right?) and those two folders need to save every time the image is rebuilt).
So, I want to be able to access /config. Preferably while the minecraft node is still reading and writing. A few questions here.
How do I make the most minimal FTP image possible when making the docker file for it? I am unable to figure out a scenario. Best I have is a base image on python:alpine and to use something like this
Is it even possible to have the node access the drive when it's in use by another? Or do I have to make some custom script in the interface im making that turns off the minecraft server and then starts up the FTP node?
Current yml:
apiVersion: v1
kind: Service
metadata:
name: lapitos
labels:
type: lapitos
spec:
type: LoadBalancer
ports:
- name: minecraft
port: 25565
protocol: TCP
targetPort: 25565
- name: minecraft-rcon
port: 25575
protocol: TCP
targetPort: 25575
selector:
app: lapitos
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: lapitos
spec:
serviceName: lapitos
replicas: 1
selector:
matchLabels:
app: lapitos
template:
metadata:
labels:
app: lapitos
spec:
containers:
- name: lapitos
image: gcr.io/mchostingnet-202204/lapitosbeta2
resource:
limits:
cpu: "2"
requests:
cpu: "2"
ports:
- containerPort: 25565
name: minecraft
volumeMounts:
- name: world
mountPath: /world
- name: config
mountPath: /config
- name: logs
mountPath: /logs
volumeClaimTemplates:
- metadata:
name: world
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 25Gi
- metadata:
name: config
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi
- metadata:
name: logs
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi

Answer 1

1.- Grab an ftp image that suits you from any registry and use it, instead of making your own. If still is a requirement, I don't know.
Note: Compute Engine has got port 21 blocked.
2.- Yes, you can. Volume access modes:
ReadWriteOnce – the volume can be mounted as read-write by a single node
ReadOnlyMany – the volume can be mounted read-only by many nodes
ReadWriteMany – the volume can be mounted as read-write by many nodes