feat(docker): create ENV for directory changes in docker

adds ability to update some variables using ENV variables in docker.

a

linuxgsm.sh

@@ -28,17 +28,17 @@ rootdir=$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")
 selfname=$(basename "$(readlink -f "${BASH_SOURCE[0]}")")
 sessionname=$(echo "${selfname}" | cut -f1 -d".")
 lgsmdir="${rootdir}/lgsm"
-logdir="${rootdir}/log"
+[ -n "${LGSM_LOGDIR}" ] && logdir="${LGSM_LOGDIR}" || logdir="${rootdir}/log"
 lgsmlogdir="${logdir}/lgsm"
 steamcmddir="${HOME}/.steam/steamcmd"
-serverfiles="${rootdir}/serverfiles"
+[ -n "${LGSM_SERVERFILES}" ] && serverfiles="${LGSM_SERVERFILES}" || serverfiles="${rootdir}/serverfiles"
 modulesdir="${lgsmdir}/modules"
 tmpdir="${lgsmdir}/tmp"
 datadir="${lgsmdir}/data"
 lockdir="${lgsmdir}/lock"
 serverlist="${datadir}/serverlist.csv"
 serverlistmenu="${datadir}/serverlistmenu.csv"
-configdir="${lgsmdir}/config-lgsm"
+[ -n "${LGSM_CONFIG}" ] && configdir="${LGSM_CONFIG}" || configdir="${lgsmdir}/config-lgsm"
 configdirserver="${configdir}/${gameservername}"
 configdirdefault="${lgsmdir}/config-default"
 userinput="${1}"