script fixes

build.sh

@@ -1,16 +1,19 @@
 #!/usr/bin/env bash
 set -e
 
-DIR="$(dirname $(readlink -f $0))"
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
-echo -e "\n# Building Web"
+echo ""
+echo "# Building Web"
 
-echo -e "\nBuilding app"
-echo -e "npm version $(npm --version)"
-echo -e "gulp version $(gulp --version)"
+echo ""
+echo "Building app"
+echo "npm version $(npm --version)"
+echo "gulp version $(gulp --version)"
 npm install
 gulp dist:selfHosted
 
-echo -e "\nBuilding docker image"
+echo ""
+echo "Building docker image"
 docker --version
 docker build -t bitwarden/web $DIR/.