Refactor all private data

[nklsla]

All hardcoded IP-addresses, ports and anyhting that would be a specific solution for the target machine etc.

• [x] IPs
• [x] Node name
• [x] Host names
• [x] flannel version
• [x] nodeports
• [x] static cluster ips
• [x] push public version and add to .gitignore

[nklsla]

Also all nodes IP's could be compiled into a shell script that exports variables. Then only one place needs to change. Should work since all manifests are started/runned/applied from the same machine at most of the times.

[nklsla]

Add version control via variables for installation/initiation.

• CNI - Flannel
• CRI - crun
• kubeadm/-clt/-let

[nklsla]

Move all private/setup-specific values and files to a private repo and add it as a submodule into this, before making it public

[nklsla]

include all exposed ports, both in manifests and in documentation.

[nklsla]

Used submodule instead of .gitignore. Wouldnt be able to keep track of config otherwise..