Configures webpackDevServer to allow hosting with gitpod.

.gitpod.yml

@@ -1,6 +1,7 @@
 tasks:
+  - command: gp await-port 3000 && gp preview $(gp url 3000)/examples/browser/demo.html
   - init: npm install
     command: npm start
 ports:
   - port: 3000
-    onOpen: open-preview
+    onOpen: ignore

README.md

@@ -105,6 +105,10 @@ npm start
 The development server will be available at http://localhost:3000/examples/browser/demo.html in your favorite browser.
 It will automatically rebuild `tesseract.dev.js` and `worker.min.js` when you change files in the src folder.
 
+You can also run the development server in Gitpod ( a free online IDE and dev environment for GitHub ) with a single click.
+
+[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/naptha/tesseract.js/blob/master/examples/browser/demo.html)
+
 ### Building Static Files
 To build the compiled static files just execute the following:
 ```shell

scripts/webpack.config.dev.js

@@ -20,6 +20,9 @@ const genConfig = ({
       },
     }),
   ],
+  devServer: {
+      allowedHosts: ['localhost', '.gitpod.io'],
+  },
 });
 
 module.exports = [