Added clean job

Author: HammadTheOne

dash/development/build_process.py

@@ -76,6 +76,7 @@ def build(self, build=None):
         self.npm()
         self.bundles(build)
         self.digest()
+        self.cleanModules()
 
     @job("compute the hash digest for assets")
     def digest(self):
@@ -146,6 +147,12 @@ def bundles(self, build=None):
         ) as fp:
             fp.write(t.safe_substitute(versions))
 
+    @job("clean node_modules directory 🧹")
+    def cleanModules(self):
+        """Job to clean node_modules directory from installed Dash package."""
+        os.chdir(self.main)
+        run_command_with_process("rm -rf node_modules")
+
 
 class Renderer(BuildProcess):
     def __init__(self):