Deploy stack by default on install/upgrade

[jakolehm]

No description provided.

[SpComb]

👍 although this could also be linked to some issue on implementing a kontena stack deploy --noop, that shows what changes would be deployed on upgrade.

[kke]

(--noop = --dry-run)

[SpComb]

Docs need updating:

• https://github.com/kontena/kontena/blob/master/docs/getting-started/quick-start.md#step-4-deploy-your-first-application-stack

  $ kontena stack install --deploy kontena.yml

• https://github.com/kontena/kontena/blob/master/docs/using-kontena/stacks.md#deploying-stacks

  Use the --deploy flag to simultaneously deploy the stack services to the grid [...] If you omit the kontena stack install --deploy flag, then you must run kontena stack deploy wordpress-red separately.

[jakolehm]

Something is off here.. let's see if I can cleanup this with a new rebase.