`podman-compose` currently does not support interpolating environment
variables in dictionary keys, despite the compose file specification
indicating this capability.
See the relevant compose-spec documentation:
https://github.com/compose-spec/compose-spec/blob/main/12-interpolation.md
This feature is useful in `labels` or `environment` sections, where keys
can be user-defined strings. To enable interpolation, an alternate equal
sign syntax must be used, e.g.:
services:
foo:
labels:
- "$VAR_NAME=label_value"
After this PR `podman-compose` will align more closely with the compose
file specification, allowing for the interpolation of environment
variables in dictionary keys.
Signed-off-by: Monika Kairaityte <monika@kibit.lt>
