SSR calls don't forward cookies from the request

[dlbnco]

In the event that the browser has cookies that are relevant to the requests made by Apollo, they should be included by the client that is run on the server-side.

This can easily be achieved by modifying the getApolloClient() function to receive an optional cookies string:

export function getApolloClient(
  forceNew: boolean,
  cookie?: string,
): ApolloClientType {
  if (!CLIENT || forceNew) {
    CLIENT = new ApolloClient({
      ssrMode: isServer,
      uri,
      cache: new InMemoryCache().restore(windowApolloState || {}),
      credentials: 'include',
      headers: {
        Cookie: cookie ?? '',
      },
    });
  }
  return CLIENT;
}

Then, on _document.tsx, just pass the cookie from the context when getting the client:

const apolloClient = getApolloClient(true, ctx.req?.headers.cookie);

I can make a pull request later :)