Pass symbolicator config as YAML

[philicious]

This adds more config options to symbolicator deployment.

We needed connect_to_reserved_ips , which wasnt supported, so I took the chance and added more along the way.

I tested symbolicator to start properly also with the caches enabled

[philicious]

@Mokto I could add some smybolicator paragraph to README as it wasnt totally straight-forward to get it working, like

        filestore:
          filesystem:
            persistence:
              persistentWorkers: true

but also needed to set connect_to_reserved_ips: true

maybe its even worth changing connect_to_reserved_ips to default true?

[Mokto]

I agree with both.

I'll let you update your PR and then I'll merge it.

Thanks!

[philicious]

updated README and also default value of connect_to_reserved_ips @Mokto

[Mokto]

Thaaaanks ! 👍