fix: disabling host check

[mike-hoang]

What does this PR do?:

Currently, the nodejs-angular starter project returns a Invalid Host header when validating the deployed devfile stack on CI.

Disabling the host check will allow a successful request by bypassing a security check that can result in a DNS rebinding attack.

ref: https://medium.com/webpack/webpack-dev-server-middleware-security-issues-1489d950874a

Without a different testing strategy for registries, host checking will need to be disabled. The risk is low since the dev-server is only up for ~2mins on CI and immediately destroyed once a 200 status is returned.

However, when consuming the starter project (using it for development), --public-host should be specified and would look something like this:

ng serve --host 0.0.0.0 --public-host myhost.com

Which issue(s) this PR fixes:

Fixes devfile/api#799