Move all Dockerfile samples to non-root user

Expected Behaviour

As an OpenFaaS end-user, I want to run all samples on my OpenFaaS cluster, even with the new non-root feature enabled.

Current Behaviour

Expected Behavior

When you click to the event source links, they should take you to the appropiate documentation

$ minishift status
Minishift:  Running
Profile:    minishift
OpenShift:  Stopped
DiskUsage:  ERR of

perhaps this is related to the error state from the OpenShift isRunning check

The problem faced currently?

Currently we use the default rolling upgrade strategy for upgrading services. It would be great if we could make it configurable.

How can we solve it?

Add a field in the service object to accept service upgrade strategy

If you want this feature to be implemented, give it a thumbs up reaction, so that we can determine which features are important to you.

1、当没有API文档时的空数据提示
2、当没有搜索到API文档时的空数据提示