Add initial test script

.github/workflows/test.yml

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+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on push or pull request events for any branch
+  push:
+    branches: [ "**" ]
+  pull_request:
+    branches: [ "**" ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-24.04
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v4
+
+      # Runs a single command using the runners shell
+      - name: Run a one-line script
+        run: sudo ./test/test.sh

test/test.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+export PYTHONUNBUFFERED=1
+
+uname -r
+cat /etc/os-release
+python3 --version
+
+apt-get update -qq && apt-get install -qq -y systemd-container
+
+# # TODO: create zpool with virtual disks, create jailmaker dataset and test jlmkr.py from there
+# # https://medium.com/@abaddonsd/zfs-usage-with-virtual-disks-62898064a29b
+# apt-get install -y -qq zfsutils-linux
+# modinfo zfs | grep version
+# zfs --version
+# zpool --version
+
+# TODO: create a path and/or zfs pool with a space in it to test if jlmkr.py still works properly when ran from inside
+# mkdir -p "/tmp/path with space/jailmaker"
+
+chown 0:0 jlmkr.py
+chmod +x jlmkr.py
+
+# Setup NAT to give the jail access to the outside network
+# https://wiki.archlinux.org/title/systemd-nspawn#Use_a_virtual_Ethernet_link
+iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
+iptables -I DOCKER-USER -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+iptables -I DOCKER-USER -i ve-+ -o eth0 -j ACCEPT
+iptables -A INPUT -i ve-+ -p udp -m udp --dport 67 -j ACCEPT
+
+# TODO: test jlmkr.py from inside another working directory, with a relative path to a config file to test if it uses the config file (and doesn't look for it relative to the jlmkr.py file itself)
+./jlmkr.py create --start --config=./templates/docker/config test --network-veth --system-call-filter='add_key' --system-call-filter='bpf' --system-call-filter='keyctl'
+./jlmkr.py exec test docker run hello-world
+
+# TODO: many more test cases and checking if actual output (text, files on disk etc.) is correct instead of just a 0 exit code