Add (and test) Native S2I Guide

[vorburger]

Try https://github.com/quarkusio/quarkus/blob/master/docs/src/main/asciidoc/openshift-s2i-guide.adoc (which should appear on https://quarkus.io/guides/openshift-s2i-guide very soon..) on the Workshop Demo Cluster.

Be particularly mindful of future participants not running with a privileged admin account; the patch to increase the limit may be a a problem, and need a solution in a set up such as this.

Ultimate goal of this issue would be to create a Guide for this Native S2I.

[vorburger]

future participants not running with a privileged admin account

Just FTR: Following the (my..) Quarkus Doc steps when logging into the cluster with a token obtained from the /console/ UI to which one logged in with cluster admin account, it works just fine.

[vorburger]

FTR: It seems to work, even for a "normal user" (via oc login and typing Username and Password, no token).

BTW: The guide (above) is actually wrong, I fixed it in quarkusio/quarkus#1898.

[tqvarnst]

So it seems that the problem is that we cannot patch the build config until we have created it and oc new-app will both create the build config and start a build. One solution may be to use oc cancel-build bc/quarkus-quickstart-native after the oc new-app and then patch the bc and then use oc start-build bc/quarkus-quickstart-native.

[vorburger]

FTR: @tqvarnst meanwhile documented this with an update to https://quarkus.io/guides/openshift-s2i-guide - we can probably close this issue now?