[FEATURE]: Ability to add custom config file out of the box #43885
Description
Describe the feature you'd like
My use-case requires a bit of modification to the config file and the current offerings of configurations via POSIX environment variables is lacking.
For example: To add /etc/datadog-agent/conf.d/postgres.d/conf.yaml file for AWS RDS monitoring, I have to make a custom Docker image.
Is your feature request related to a problem?
No
Describe alternatives you've considered
IMHO it would way better if the stock Docker image offers ways to mount Docker volume for config YAML files.
Additional context
No response