message: Updated developing_lagoon index.md
  Docker version 17.05 was made obsolete and removed from the official Cent Os repository:
  Version 17.06.0 has a few builder bugs that are fixed in 17.06.1, and that should be the minimal recommended release:
diff: # Development of Lagoon
  -Development of Lagoon happens locally via Docker. We are using the new [Docker Multi Stage builds](https://docs.docker.com/engine/userguide/eng-image/multistage-build/) very heavily, so it requires at least Docker Version 17.05.
  +Development of Lagoon happens locally via Docker. We are using the new [Docker Multi Stage builds](https://docs.docker.com/engine/userguide/eng-image/multistage-build/) very heavily, so it requires at least Docker Version 17.06.1.
  ## Install Docker
  