Update docker_start_script.sh

Removing DB_HOST if-else functionality, as it's not necessary for the container.

.docker/docker_start_script.sh

@@ -1,15 +1,5 @@
 #!/usr/bin/env bash
-#Configure web server
 
-# cd /usr/src/app/e-mission-server
-
-#set database URL using environment variable
-echo ${DB_HOST}
-if [ -z ${DB_HOST} ] ; then
-    local_host=`hostname -i`
-    export DB_HOST=$local_host
-    echo "Setting db host environment variable to localhost"
-fi
 cat conf/storage/db.conf
 
 if [ -z ${LIVERELOAD_SRC} ] ; then