Changed fs build command to use local gulp instance

code/build-fs

@@ -0,0 +1,2 @@
+#!/bin/bash
+node node_modules/gulp/bin/gulp.js 

code/pio_hooks.py

@@ -6,6 +6,6 @@ from SCons.Script import DefaultEnvironment
 env = DefaultEnvironment()
 
 def before_build_spiffs(source, target, env):
-    env.Execute("gulp")
+    env.Execute("node node_modules/gulp/bin/gulp.js")
 
 env.AddPreAction(".pioenvs/%s/spiffs.bin" % env['PIOENV'], before_build_spiffs)