Add standard js precommit hook (#71)

Author: tardieu

.pre-commit-config.yaml

@@ -15,4 +15,8 @@ repos:
     pass_filenames: false
     always_run: true
     args:
-    - tools/pytorchjob-generator/chart
+    - tools/pytorchjob-generator/chart
+- repo: https://github.com/standard/standard
+  rev: "v17.1.2"
+  hooks:
+  - id: standard