Add support for tmpfs

[cwolfinger]

In the latest release candidate for 1.6.0 the --tmpfs options is not available. Is it possible to add this to the service definition via some other mechanism.

[Deshke]

and it is missing in the latest release and in the docs...

[joemewes]

would also like this as it was my main reason for updating to 1.10. To utilise better readonly environments and not have to expose /tmp directories to the host via volumes. Any workarounds?

[ct-clearhaus]

@4AllDigital

Any workarounds?

We have been running read only for quite some time and have /tmp as a volume when necessary. This is fine since we can accept a "fresh" /tmp (and we set the sticky bit in the start script of the app).