diff --git a/expressjs/src/usb/entrypoint.sh b/expressjs/src/usb/entrypoint.sh
index 8b33c4e7..6efde682 100644
--- a/expressjs/src/usb/entrypoint.sh
+++ b/expressjs/src/usb/entrypoint.sh
@@ -3,78 +3,78 @@
 tmp_mount='/tmp/_balena'
 mkdir -p "$tmp_mount"
 
-# This script only works in privileged container
+# This script only works in a privileged container
 if mount -t devtmpfs none "$tmp_mount" > /dev/null 2>&1; then
-	PRIVILEGED=true
-	umount "$tmp_mount"
+  PRIVILEGED=true
+  umount "$tmp_mount"
 else
-	PRIVILEGED=false
+  PRIVILEGED=false
 fi
 rm -rf "$tmp_mount"
 
 mount_dev()
 {
-	tmp_dir='/tmp/tmpmount'
-	mkdir -p "$tmp_dir"
-	mount -t devtmpfs none "$tmp_dir"
-	mkdir -p "$tmp_dir/shm"
-	mount --move /dev/shm "$tmp_dir/shm"
-	mkdir -p "$tmp_dir/mqueue"
-	mount --move /dev/mqueue "$tmp_dir/mqueue"
-	mkdir -p "$tmp_dir/pts"
-	mount --move /dev/pts "$tmp_dir/pts"
-	touch "$tmp_dir/console"
-	mount --move /dev/console "$tmp_dir/console"
-	umount /dev || true
-	mount --move "$tmp_dir" /dev
+  tmp_dir='/tmp/tmpmount'
+  mkdir -p "$tmp_dir"
+  mount -t devtmpfs none "$tmp_dir"
+  mkdir -p "$tmp_dir/shm"
+  mount --move /dev/shm "$tmp_dir/shm"
+  mkdir -p "$tmp_dir/mqueue"
+  mount --move /dev/mqueue "$tmp_dir/mqueue"
+  mkdir -p "$tmp_dir/pts"
+  mount --move /dev/pts "$tmp_dir/pts"
+  touch "$tmp_dir/console"
+  mount --move /dev/console "$tmp_dir/console"
+  umount /dev || true
+  mount --move "$tmp_dir" /dev
 
-	# Since the devpts is mounted with -o newinstance by Docker, we need to make
-	# /dev/ptmx point to its ptmx.
-	# ref: https://www.kernel.org/doc/Documentation/filesystems/devpts.txt
-	ln -sf /dev/pts/ptmx /dev/ptmx
+  # Since the devpts is mounted with -o newinstance by Docker, we need to make
+  # /dev/ptmx point to its ptmx.
+  # ref: https://www.kernel.org/doc/Documentation/filesystems/devpts.txt
+  ln -sf /dev/pts/ptmx /dev/ptmx
 
-	# When using io.balena.features.sysfs the mount point will already exist
-	# https://jel.ly.fish/issue-i-kwdoajiuos5nmrnq
-	SYSKERNEL_DIR='/sys/kernel/debug'
+  # When using io.balena.features.sysfs the mount point will already exist
+  # https://jel.ly.fish/issue-i-kwdoajiuos5nmrnq
+  SYSKERNEL_DIR='/sys/kernel/debug'
 
-	if ! mountpoint -q "${SYSKERNEL_DIR}"; then
-		mount -t debugfs nodev "$SYSKERNEL_DIR"
-	fi
+  if ! mountpoint -q "${SYSKERNEL_DIR}"; then
+    mount -t debugfs nodev "$SYSKERNEL_DIR"
+  fi
 }
 
 start_udev()
 {
-	if [ "$UDEV" = "on" ]; then
-		if $PRIVILEGED; then
-			mount_dev
-			unshare --net udevd --daemon > /dev/null 2>&1
-			udevadm trigger > /dev/null 2>&1
-		else
-			echo "Unable to enable USB mounting support, container must be run in privileged mode."
-		fi
-	fi
+  if [ "$UDEV" = "on" ]; then
+    if $PRIVILEGED; then
+      mount_dev
+      unshare --net udevd --daemon > /dev/null 2>&1
+      udevadm trigger > /dev/null 2>&1
+    else
+      echo "Unable to enable USB mounting support, container must be run in privileged mode."
+    fi
+  fi
 }
 
 init()
 {
-	# echo error message when executable file doesn't exist.
-	if [ -n "$1" ]; then
-		if CMD=$(command -v "$1" 2>/dev/null); then
-			shift
-			exec "$CMD" "$@"
-		else
-			echo "Command not found: $1"
-			exit 1
-		fi
-	fi
+  # echo error message when executable file doesn't exist.
+  if [ -n "$1" ]; then
+    if CMD=$(command -v "$1" 2>/dev/null); then
+      shift
+      exec "$CMD" "$@"
+    else
+      echo "Command not found: $1"
+      exit 1
+    fi
+  fi
 }
 
 UDEV=$(echo "$UDEV" | awk '{print tolower($0)}')
 
 case "$UDEV" in
-	'1' | 'true')
-		UDEV='on'
-	;;
+  '1' | 'true')
+    UDEV='on'
+  ;;
 esac
 
 start_udev