move readme and robustify detector reading

Author: sw-yx

src/detect-server.js

@@ -11,7 +11,20 @@ const fs = require("fs");
 const detectors = fs
   .readdirSync(path.join(__dirname, "detectors"))
   .filter(x => x.endsWith(".js")) // only accept .js detector files
-  .map(det => require(path.join(__dirname, `detectors/${det}`)));
+  .map(det => {
+    try {
+      return require(path.join(__dirname, `detectors/${det}`));
+    } catch (err) {
+      console.error(
+        `failed to load detector: ${chalk.yellow(
+          det
+        )}, this is likely a bug in the detector, please file an issue in netlify-dev-plugin`,
+        err
+      );
+      return null;
+    }
+  })
+  .filter(Boolean);
 
 module.exports.serverSettings = async devConfig => {
   let settingsArr = [];