Fix ps:set-restart-policy being deprecated on dokku 0.22.0

[whollacsek]

Fixing this issue: #10

[badsyntax]

Thanks for this. Can you update the dokku version in the workflow test.yml file to get the tests to pass?

[whollacsek]

Done it should be good in few moments 👍

[badsyntax]

Test still failing due to removal of ps_stop (see dokku/dokku#4149)

I believe you can replace this line:

dokku-discourse/internal-functions

Line 105 in 1852fdd

[[ -n $("$DOCKER_BIN" ps -q -f ancestor="dokku/$APP_NAME") ]] && ps_stop "$APP_NAME"

With

[[ -n $("$DOCKER_BIN" ps -q -f ancestor="dokku/$APP_NAME") ]] && dokku ps:stop "$APP_NAME"

Once that change is made i'll merge, and then i'll follow up with some additional changes for better support across different versions.

[badsyntax]

Thanks for the contribution. I have added a follow up PR with #12