chore(github): ISSUE_TEMPLATE

Author: chimurai

ISSUE_TEMPLATE.md

@@ -0,0 +1,21 @@
+### Expected behavior
+
+### Actual behavior
+
+### Setup
+
+* http-proxy-middleware: _version_
+* server: _connect/express/browser-sync..._ + _version_
+* other relevant modules
+
+#### proxy middleware configuration
+```javascript
+var apiProxy = proxy('/api', {target:'http://www.example.org', changeOrigin:true});
+```
+#### server mounting
+```javascript
+var app = express();
+
+app.use(apiProxy);
+app.listen(3000);
+```