Typed Sass Styling (#69)

* Addresses issue #16 -
Add styles via sass and module imports
Adds typed scss imports via gatsby-plugin-sass.
Makes use of .d.scss file generated by gatsby-plugin-scss-typescript,
but avoids importing that directly while they work out issue in gatsby v3.

* adding vscode config for easier local debugging

client/src/components/layout.tsx

@@ -0,0 +1,19 @@
+import React, { ReactNode } from "react";
+import * as styles from './layout.module.scss';
+import J40Header from './J40Header';
+import J40Footer from "./J40Footer";
+interface ILayoutProps {
+  children: ReactNode
+}
+
+const Layout = ({ children }: ILayoutProps) => {
+  return (
+      <div className={styles.site}>
+        <J40Header />
+        <div className={styles.siteContent}>{children}</div>
+        <J40Footer />
+      </div>
+  );
+};
+
+export default Layout;