add helper script

i2psnark.sh

@@ -0,0 +1,38 @@
+#!/bin/sh --
+set -ue
+
+NAME=i2psnark # container name
+
+# host dirs
+DIR="${XDG_DOWNLOAD_DIR:-${HOME}/Downloads}/i2psnark" # root dir
+DL="${DIR}/dl"                                        # downloads dir
+CONF="${DIR}/i2psnark.config.d"                       # config dir
+
+case "${1:-}" in
+fg) set -- --rm ;;
+bg) set -- --restart=always -d ;;
+stop)
+	for action in stop rm; do
+		docker "${action}" "${NAME}"
+	done
+	exit
+	;;
+*)
+	printf 1>&2 '%s\n' \
+		"Usage: ${0##*/} {fg,bg,stop}" \
+		'  fg   - run container in foreground' \
+		'  bg   - run container in background (auto restarts)' \
+		'  stop - stop container runned in bg (and disable restarts)'
+	exit 1
+	;;
+esac
+
+set -- "${@}" -it \
+	--net=host \
+	--name="${NAME}" \
+	-v "${DL}:/i2psnark/i2psnark" \
+	-v "${CONF}:/i2psnark/i2psnark.config.d" \
+	-e USER_ID="$(id -u "${USER:-$(whoami)}")" \
+	"${NAME}"
+
+exec docker run "${@}"