fix: install_app set branch

build/erpnext-nginx/install_app.sh

@@ -4,8 +4,7 @@ APP_NAME=${1}
 APP_REPO=${2}
 APP_BRANCH=${3}
 
-[ "${APP_BRANCH}" ] && \ 
-  BRANCH="-b ${APP_BRANCH}"
+[ "${APP_BRANCH}" ] && BRANCH="-b ${APP_BRANCH}"
 
 cd /home/frappe/frappe-bench
 mkdir -p /home/frappe/frappe-bench/sites
@@ -13,7 +12,7 @@ echo "frappe\n${APP_NAME}" > /home/frappe/frappe-bench/sites/apps.txt
 
 install_packages git python2
 
-mkdir -p apps sites/assets 
+mkdir -p apps sites/assets
 cd apps
 git clone --depth 1 https://github.com/frappe/frappe ${BRANCH}
 git clone --depth 1 ${APP_REPO} ${BRANCH}