Describe the bug

Python Django devfile cannot preview the application.

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

1. Start the Django Python devfile from the Get Started Page
2. Run these commands:
   • set up venv
   • install dependencies

What

A new ctx.forward utility may be added to forward the currently captured request to its original destination (bypass).

Why

• See #655

Currently bypassing is done via implicit/explicit return in the resolver. This is not intuitive and deterministic action, which also makes it hard to distinguish when the user forgot to return a mocked response, and when they meant to b

This feature enables the ipsec backend for Flannel in the k3sup install command

Expected Behaviour

An additional flag to k3sup install should enable ipsec for Flannel as

Some prior art here:

https://github.com/puppeteer/examples/blob/master/verify_sw_caching.js
https://michaljanaszek.com/blog/test-website-performance-with-puppeteer/#cacheAndServiceWorker

I hope the official can add a new command to automatically generate RESTful API