Create getting started screencast

[simitt]

Create a short screencast, showing how to get started.

Rough layout:

• already have a k8s cluster with a java and nodejs app up & running (might be reusing opbeans)
• already have a Elastic Stack with APM Server running (referencing Elastic Cloud and/or ECK)
• show minimal steps how to instrument existing applications with the k8s webhook and show data showing up in APM UI.

Goal:

• Show how to get started with the webhook with a minimal set of required steps (basic configurations of server and secret etc.), withouth going into any details on how to build the webhook etc.
• No prior knowledge about webhooks should be required.
• The screencast should be ready to be made available publicly.

Stretch:
Look into how a basic setup for a smoke test could be used for this.

[marclop]

Before I record the screencast, would we want to wait for the helm chart to be renamed? or is that orthogonal?

[felixbarny]

Yes, I think we should do that first, so that the screencast isn't outdated on arrival.

[simitt]

Sounds good, I set a deadline for naming discussions - if there are no objections, please change the names and start with the screencast.

[felixbarny]

Let's also try to resolve this naming discussions before recording the screencast: #28