feat: support for basePath (#374)

* feat: support for basePath

* chore: cleanup, catch-all, cypress tests pass

Author: lindsaylevine

src/cypress/fixtures/next.config.js-with-basePath

@@ -0,0 +1,4 @@
+module.exports = {
+  target: "experimental-serverless-trace",
+  basePath: "/foo",
+};

src/cypress/fixtures/pages/getServerSideProps/[id].js

@@ -11,7 +11,7 @@ const Show = ({ errorCode, show }) => {
   return (
     <div>
       <p>
-        This page uses getInitialProps() to fetch the show with the ID provided in the URL: /shows/:id
+        This page uses getServerSideProps() to fetch the show with the ID provided in the URL: /shows/:id
         <br />
         Refresh the page to see server-side rendering in action.
         <br />

src/cypress/fixtures/pages/getServerSideProps/static.js

@@ -3,7 +3,7 @@ import Link from 'next/link'
 const Show = ({ show }) => (
   <div>
     <p>
-      This page uses getInitialProps() to fetch the show with the ID provided in the URL: /shows/:id
+      This page uses getServerSideProps() to fetch the show with the ID provided in the URL: /shows/:id
       <br />
       Refresh the page to see server-side rendering in action.
       <br />