MAV-934: Ensure correct script pathing

Author: TheOneFromNorway

bin/start.sh

@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+cd "$SCRIPT_DIR" || { echo "Failed to change directory to $SCRIPT_DIR"; exit 1; }
+
 if [ "$SERVER_TYPE" == "thrust" ]; then
   echo "Starting Thrust server..."
   ./thrust ./rails server
@@ -8,5 +11,6 @@ elif [ "$SERVER_TYPE" == "background" ]; then
   ./bundle exec good_job start
 else
   echo "SERVER_TYPE variable: '$SERVER_TYPE' unknown. Allowed values ['thrust','background']"
-  exit 1
+  cd - && exit 1
 fi
+cd - || return 2