Update .eslintrc.json and add prettier support

Add pre-commit hook to lint staged files
Add some eslint plugins

Gitlab: #2

Change-Id: Iea7800b66992dcb4b87501544647aedafe07a509
diff --git a/client/webpack.config.d.ts b/client/webpack.config.d.ts
new file mode 100644
index 0000000..d7b0762
--- /dev/null
+++ b/client/webpack.config.d.ts
@@ -0,0 +1,5 @@
+import { Configuration } from 'webpack';
+
+declare const config: Configuration;
+
+export default config;