Cameron Diver 14e442f943 Add support for container contracts
These contracts can specify an OS version and supervisor version that
they require. If any of the containers in a release have requirements
that are not met, the release is rejected, and the previous release
continues to run.

Change-type: minor
Closes: #1086
Signed-off-by: Cameron Diver <cameron@balena.io>
2019-10-01 16:17:44 +01:00
..
2019-06-19 23:31:58 +03:00
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