SERVER-67329 Add proxy middleware to allow react-scripts start

buildscripts/libdeps/graph_visualizer_web_stack/src/setupProxy.js

@@ -0,0 +1,17 @@
+/**
+ * This proxy is intended to allow the visualizer to run in a development environment
+ * which includes SSH tunnels communicating with private remote hosts.
+ */
+
+const { createProxyMiddleware } = require('http-proxy-middleware');
+
+module.exports = function(app) {
+    app.use(
+        createProxyMiddleware('/socket.io', {
+            target: 'http://localhost:5000',
+            ws: true,
+            changeOrigin: true,
+            secure: false
+        })
+    );
+};