Update build.sh

build.sh

@@ -5,8 +5,6 @@ set -euo pipefail
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
 PROJECT="$(basename "${SCRIPT_DIR}")"
 
-export CMAKE_BUILD_TYPE="Debug"
-
 rm -rf "${SCRIPT_DIR}/output" 
 mkdir -p "${SCRIPT_DIR}/output"
 
@@ -24,7 +22,6 @@ docker build \
   -t "${PROJECT}-build" \
   -f "${SCRIPT_DIR}/Dockerfile.dropshell-build" \
   --build-arg PROJECT="${PROJECT}" \
-  --build-arg CMAKE_BUILD_TYPE="${CMAKE_BUILD_TYPE}" \
+  --build-arg CMAKE_BUILD_TYPE="${CMAKE_BUILD_TYPE:-DEBUG}" \
   --output "${SCRIPT_DIR}/output" \
   "${SCRIPT_DIR}"
-