Overview docs

[felixbarny]

Preview of the setup page:

TODOs

• Release on elastic.co
• Remove intro section of the Java logger in favor of this
• Remove step 2 (Enable APM log correlation) and step 3 (configure filebeat) of the Java get started docs in favor of this.
• Decide on how to include/link to the general into section from the individual loggers (so far Java and .NET)

Follow-ups for later

Getting started guides for more platforms, such as PCF, S3, CloudWatch, Azure, ...

closes #31

[bmorelli25]

Decide on how to include/link to the general into section from the individual loggers (so far Java and .NET)

As discussed in https://github.com/elastic/ecs-logging/issues/31, since we can't have one ECS doc book to rule them all (due to varying versioning), my initial thought was to add include statements to this content and include it in each agent's ECS docs. If we go this route, I don't think we need to build an ecs-logging book. We'd only build the agent books, and each would pull in the shared content from this repo. In this scenario, it's probably easiest to just merge this PR and https://github.com/elastic/ecs-dotnet/pull/120, and let me set everything up in follow-up PRs

[felixbarny]

After you approve this PR, feel free to merge it and proceed with the follow-ups. Thanks 🙂

[felixbarny]

Is it feasible to include the Filebeat setup guide (step 3) from the overview docs into the logger setup guides? If not, linking to them should be good enough.

[bmorelli25]

Is it feasible to include the Filebeat setup guide (step 3) from the overview docs into the logger setup guides? If not, linking to them should be good enough.

Yes, that is possible.