cleanup

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

tor-relay/Dockerfile

@@ -20,6 +20,7 @@ FROM alpine:latest
 LABEL maintainer "Jessie Frazelle <jess@linux.com>"
 
 RUN apk --no-cache add \
+	bash \
 	tor
 
 # default port to used for incoming Tor connections

tor-relay/run.sh

@@ -1,4 +1,6 @@
-#!/bin/sh
+#!/bin/bash
+set -e
+set -o pipefail
 
 for relaytype in bridge middle exit; do
 	sed -i 's/${RELAY_NICKNAME}/'"$RELAY_NICKNAME"'/g' "/etc/tor/torrc.$relaytype"
@@ -9,4 +11,4 @@ for relaytype in bridge middle exit; do
 	sed -i 's/${RELAY_BANDWIDTH_BURST}/'"$RELAY_BANDWIDTH_BURST"'/g' "/etc/tor/torrc.$relaytype"
 done
 
-tor -f /etc/tor/torrc.${RELAY_TYPE}
+exec tor -f /etc/tor/torrc.${RELAY_TYPE}