Add v2.2 format description to versioning index

Signed-off-by: Joffrey F <joffrey@docker.com>
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Joffrey F 2017-04-26 15:31:31 -07:00 committed by Misty Stanley-Jones
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@ -183,6 +183,18 @@ Introduces the following additional parameters:
- [`healthcheck`](compose-file-v2.md#healthcheck)
- [`sysctls`](compose-file-v2.md#sysctls)
### Version 2.2
An upgrade of [version 2.1](#version-21) that introduces new parameters only
available with Docker Engine version **1.13.0+**. This version also allows
to specify default scale numbers inside the service's configuration.
Introduces the following additional parameters:
- [`init`](compose-file-v2.md#init)
- [`scale`](compose-file-v2.md#scale)
### Version 3
Designed to be cross-compatible between Compose and the Docker Engine's