Add caching environment instructions

[epassaro]

Provided instructions on how to cache deployed environments for Miniforge variants.

[epassaro]

Hi @goanpeca, these are my changes.

[EwoutH]

Great addition, thanks!

[goanpeca]

Hi @epassaro thanks for this.

Could you on top of this add an actual example that runs like the others?

See https://github.com/conda-incubator/setup-miniconda/tree/master/.github/workflows

[epassaro]

Yes, sure.

[epassaro]

Added the example, needs approval to run @goanpeca

[jaimergp]

Thank you so much @epassaro! We can merge once the CI is passing!

[jonashaag]

This doesn't seem to work as advertised. The DATE env var isn't taken into account:

win-64-conda-95d949d6b25a373b614d944993ac0d3be055e69ebfaf5fae91173f00c5b4106d--0

There should be a date between the last two -.

[epassaro]

This doesn't seem to work as advertised. The DATE env var isn't taken into account:

win-64-conda-95d949d6b25a373b614d944993ac0d3be055e69ebfaf5fae91173f00c5b4106d--0

There should be a date between the last two -.

I realized that the unix command date doesn't work on Windows. I need to add some logic in order to make it work for all the OSes. Please open an issue.

[jonashaag]

See #212