Don't bork locally without Hydro (#16361)

* Add hydro.maySend() check

* Return a 200 to differentiate

* Add NODE_ENV check, move below validation

Author: JasonEtco

middleware/events.js

@@ -11,10 +11,17 @@ const router = express.Router()
 
 router.post('/', async (req, res, next) => {
   const fields = omit(req.body, '_csrf')
+
   if (!ajv.validate(schema, fields)) {
     if (process.env.NODE_ENV === 'development') console.log(ajv.errorsText())
     return res.status(400).json({})
   }
+
+  // Don't depend on Hydro on local development
+  if (process.env.NODE_ENV === 'development' && !req.hydro.maySend()) {
+    return res.status(200).json({})
+  }
+
   try {
     const hydroRes = await req.hydro.publish(
       req.hydro.schemas[fields.type],