Remove graphhopper.sh (#2)

* Remove graphhopper.sh file

This still needs to be tested...

* Remove graphhopper.sh, fix java arguments

* Update README.md

* Update Dockerfile

* Add more concrete example

README.md

@@ -13,3 +13,16 @@ This repository is extremely simple, all it does is the following:
 That's all.
 
 Feel free to submit issues or pull requests if you would like to improve the code here
+
+In order to use this image there are two environment variables you need to pass to docker:
+```
+JAVA_OPTS: "-Xmx1g -Xms1g -Ddw.server.application_connectors[0].bind_host=0.0.0.0 -Ddw.server.application_connectors[0].port=8989"
+TOOL_OPTS: "-Ddw.graphhopper.datareader.file=flie-location-inside-docker.pbf -Ddw.graphhopper.graph.location=default-gh"
+```
+
+Without the `TOOL_OPTS` this image won't run!
+
+You can also completely override the entry point and use this for example:
+```
+docker run --entrypoint /bin/bash israelhikingmap/graphhhopper -c "wget https://download.geofabrik.de/europe/germany/berlin-latest.osm.pbf -O /data/berlin.osm.bpf && java -Ddw.graphhopper.datareader.file=/data/berlin.osm.pbf -Ddw.graphhopper.graph.location=berlin-gh -jar *.jar server config-example.yml"
+```