Move lib and test into src directory

Signed-off-by: Philip Molares <philip.molares@udo.edu>

src/lib/web/middleware/tooBusy.ts

@@ -0,0 +1,14 @@
+import toobusy from 'toobusy-js'
+import { errors } from '../../errors'
+import { config } from '../../config'
+import { NextFunction, Request, Response } from 'express'
+
+toobusy.maxLag(config.tooBusyLag)
+
+export function tooBusy (req: Request, res: Response, next: NextFunction): void {
+  if (toobusy()) {
+    errors.errorServiceUnavailable(res)
+  } else {
+    next()
+  }
+}