Draft dockerfile and entrypoint

Dockerfile

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+FROM efrecon/runner-krunvm.base:main
+
+ARG INSTALL_VERSION=latest
+ARG INSTALL_NAMESPACE=/opt/gh-runner-krunvm
+
+COPY runner/*.sh ${INSTALL_NAMESPACE}/bin/
+RUN chmod a+x "${INSTALL_NAMESPACE}/bin/*.sh" \
+    && "${INSTALL_NAMESPACE}/bin/install.sh" -v -l /dev/stdout
+
+ENTRYPOINT ["${INSTALL_NAMESPACE}/bin/entrypoint.sh"]
+CMD ["./bin/Runner.Listener", "run", "--startuptype", "service"]

runner/entrypoint.sh

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+#!/usr/bin/dumb-init /bin/sh
+# shellcheck shell=sh
+
+# Shell sanity. Stop on errors and undefined variables.
+set -eu
+
+# This is a readlink -f implementation so this script can (perhaps) run on MacOS
+abspath() {
+  is_abspath() {
+    case "$1" in
+      /* | ~*) true;;
+      *) false;;
+    esac
+  }
+
+  if [ -d "$1" ]; then
+    ( cd -P -- "$1" && pwd -P )
+  elif [ -L "$1" ]; then
+    if is_abspath "$(readlink "$1")"; then
+      abspath "$(readlink "$1")"
+    else
+      abspath "$(dirname "$1")/$(readlink "$1")"
+    fi
+  else
+    printf %s\\n "$(abspath "$(dirname "$1")")/$(basename "$1")"
+  fi
+}