feat: add docker entry point and adjust docker file

- Add docker entry point file for supporting routed_startup, compile_mapdata

Related #3.

docker-orchestration/osrm-backend/docker-entrypoint.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+DATA_PATH=${DATA_PATH:="/osrm-data"}
+
+_sig() {
+  kill -TERM $child 2>/dev/null
+}
+
+if [ "$1" = 'routed_startup' ]; then
+  trap _sig SIGKILL SIGTERM SIGHUP SIGINT EXIT
+  ./osrm-routed $DATA_PATH/$2.osrm -a MLD --max-table-size 8000 &
+  child=$!
+  wait "$child"
+elif [ "$1" = 'compile_mapdata']; then
+  trap _sig SIGKILL SIGTERM SIGHUP SIGINT EXIT
+  if [ ! -f $DATA_PATH/$2.osrm ]; then
+    if [ ! -f $DATA_PATH/$2.osm.pbf ]; then
+      curl $3 > $DATA_PATH/$2.osm.pbf
+    fi
+    ./osrm-extract $DATA_PATH/$2.osm.pbf -p profile.lua
+    ./osrm-partition $DATA_PATH/$2.osrm
+    ./osrm-customize $DATA_PATH/$2.osrm
+  fi  
+else
+  exec "$@"
+fi