Document environment variable configuration in manifest

[gmr]

Pretty sure it's a list of strings:

["FOO=BAR", "BAZ=QUX"]

Double check and add example to documents.

[hunt3r]

We tried

env:
     - DEPLOY_LOCAL=1

This did not seem to work either, just FYI.

I believe it's related to these lines:

 if container.get 'env'
        config.Env = container.get 'env'
 if not env?
        config.Env = []

env is never assigned and there for will always be falsy, config.Env will always be assigned new array, which explains why we see VM_IPADDR in our environment vars.

The next line successfully assigned the variable by pushing into the list.

config.Env.push "VM_IPADDR=#{network.get 'ip'}"

[hunt3r]

PR Incoming.