Add docker+syslog+otel-collector tutorial

[ddelemeny]

Description

Add a tutorial to collect logs from docker's syslog driver. Copy pasta from the docker log tutorial. WIP

TODO

• Test it on different configs
• update screenshots

Feedback appreciated.

[etolbakov]

@ddelemeny I was curious to check it out, looks very good 👍! Just left a some of nitpicks. Also in some places I would use maybe a different wording but nothing that serious.