fix(links): unify linking to pages internal/external

client/src/components/helpers/Link.js

@@ -0,0 +1,20 @@
+import React from 'react';
+import { Link as GatsbyLink } from 'gatsby';
+
+const Link = ({ children, to, external, ...other }) => {
+  if (!external && (/^\/(?!\/)/).test(to)) {
+    return (
+      <GatsbyLink to={to} {...other}>
+        {children}
+      </GatsbyLink>
+    );
+  }
+
+  return (
+    <a href={to} {...other} rel='noopener noreferrer' target='_blank'>
+      {children}
+    </a>
+  );
+};
+
+export default Link;