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

Kubectl explains is useful for a Fission user to write function specs especially but it does not give any information as of now.

$ kubectl explain functions -ndefault
KIND:     Function
VERSION:  fission.io/v1

DESCRIPTION:
     <empty>

It should look something similar to:

$ kubectl explain pod.spec
KIND:     Pod
VERSION:  v1

RESOURCE: spec <Object>

DESCRIPTION

The typescript runtime was recently added to openwhisk but we do not yet have docs for the runtime and it is missing from runtimes.json.

We need a doc like https://github.com/apache/incubator-openwhisk/blob/master/docs/actions-nodejs.md for typescript functions.

Adding the runtime to the runtime manifest can be done per https://github.com/apache/openwhisk/blob/master/docs/actions-new.md#the-

this will very quickly get out of hand if we allow it, i realize we don't have principles written down anywhere but to date one of them has been that binaries 'just work' without having to do any configuration. currently a user must set FN_MAX_REQUEST_SIZE, FN_MAX_RESPONSE_SIZE -- neither of these should be required to run.

test case:

cd tests/fn-system-tests/
go test -v

this

Rate limit

It became apparent to me that we have not kept the docs current as to what values in the manifest now support interpolation (and more could!).

This involves going through the manifest parser: https://github.com/mrutkows/openwhisk-wskdeploy/blob/master/parsers/manifest_parser.go

and look for all places where a value is extracted via the "InterpolateStringWithEnvVar()" function and document