Cleaned the server-node dir

Split express into different ports for easier migration
Typed page ops that had warnings

server-node/src/utils/endpoint-utils.js

@@ -1,9 +0,0 @@
-
-export function respondWithBinaryPdf(res, buffer, filename) {
-    res.writeHead(200, {
-        'Content-Type': "application/pdf",
-        'Content-disposition': 'attachment;filename=' + filename,
-        'Content-Length': buffer.length
-    });
-    res.end(Buffer.from(buffer, 'binary'))
-}