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

$ 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?

The eventing system of space cloud uses event & invocation logs table to store information of events. This data can become huge, if unchecked. We should periodically delete the data.

How can we solve it?

In the evening section of mission control under the settings tab, we should be able to configure, how we want to handle the generated eventing data.
Ther

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