Ensure directory is created

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

src/startapp.sh

@@ -1,4 +1,7 @@
 #!/bin/sh
 
+mkdir -p /app/cura/config
+mkdir -p /app/cura/data
+
 export HOME=/home
 exec /opt/cura/usr/bin/cura.sh