diff --git a/graphhopper.sh b/graphhopper.sh
index 06e6b45..9e8731b 100755
--- a/graphhopper.sh
+++ b/graphhopper.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 (set -o igncr) 2>/dev/null && set -o igncr; # this comment is required for handling Windows cr/lf
-# See StackOverflow answer http://stackoverflow.com/a/14607651
+# See StackOverfix answer http://stackoverflow.com/a/14607651
 
 GH_HOME=$(dirname "$0")
 JAVA=$JAVA_HOME/bin/java
@@ -16,7 +16,7 @@ fi
 echo "## using java $vers from $JAVA_HOME"
 
 function printBashUsage {
-  echo "$(basename $0): Start a Gpahhopper server."
+  echo "$(basename $0): Start a Graphhopper server."
   echo "Default user access at 0.0.0.0:8989 and API access at 0.0.0.0:8989/route"
   echo ""
   echo "Usage"
@@ -29,10 +29,17 @@ function printBashUsage {
   echo "-c | --config <config>    application configuration file location"
   echo "-o | --graph-cache <dir>  directory for graph cache output"
   echo "--port <port>             port for web server [default: 8989]"
-  echo "--host <host>             host address of the web server [default: 0.0.0.0]"
-  echo "-h | --help               display this message"
+  echo "-h | --help               display this help message"
+  echo ""
+  echo "environment variables:"
+  echo "GH_URL                    download input file from this URL and save as data.pbf"
 }
 
+# Check for environment variable first
+if [ -z "$URL" ] && [ ! -z "$GH_URL" ]; then
+  URL="$GH_URL"
+fi
+
 # one character parameters have one minus character'-'. longer parameters have two minus characters '--'
 while [ ! -z $1 ]; do
   case $1 in
@@ -42,7 +49,6 @@ while [ ! -z $1 ]; do
     --url) URL="$2"; shift 2;;
     -o|--graph-cache) GRAPH="$2"; shift 2;;
     --port) GH_WEB_OPTS="$GH_WEB_OPTS -Ddw.server.application_connectors[0].port=$2"; shift 2;;
-    --host) GH_WEB_OPTS="$GH_WEB_OPTS -Ddw.server.application_connectors[0].bind_host=$2"; shift 2;;
     -h|--help) printBashUsage
         exit 0;;
     -*) echo "Option unknown: $1"
@@ -59,7 +65,11 @@ done
 : "${JAVA_OPTS:=-Xmx1g -Xms1g}"
 : "${JAR:=$(find . -type f -name "*.jar")}"
 
+# Hardcoded host to 0.0.0.0
+GH_WEB_OPTS="$GH_WEB_OPTS -Ddw.server.application_connectors[0].bind_host=0.0.0.0"
+
 if [ "$URL" != "" ]; then
+  echo "## Downloading OSM data from: $URL"
   wget -S -nv -O "${FILE:=data.pbf}" "$URL"
 fi
 
@@ -69,4 +79,4 @@ mkdir -p $(dirname "${GRAPH}")
 echo "## Executing $ACTION. JAVA_OPTS=$JAVA_OPTS"
 
 exec "$JAVA" $JAVA_OPTS ${FILE:+-Ddw.graphhopper.datareader.file="$FILE"} -Ddw.graphhopper.graph.location="$GRAPH" \
-        $GH_WEB_OPTS -jar "$JAR" $ACTION $CONFIG
+        $GH_WEB_OPTS -jar "$JAR" $ACTION $CONFIG
\ No newline at end of file