[build] Add windninja build instructions to Dockerfile (instead of relying on external container).
[build] Add windninja build instructions to Dockerfile (instead of relying on external container).

fire-rs-laas/fire-rs-saop,fire-rs-laas/fire-rs-saop,fire-rs-laas/fire-rs-saop,fire-rs-laas/fire-rs-saop