cannot use postgres-client-10 in ruby:2.4.4 image

[ghost]

For several reasons, our project should do apt-get install postgres-client-10 in ruby docker container, but can not do with the current ruby:2.4.4 image.
I can do this with the image created two weeks ago.

[yosifkit]

I would guess this is because the default images have moved from jessie to stretch (see #210). Perhaps you need to either use ruby:2.4.4-jessie or switch your postgres apt url to use their stretch repo.

[ghost]

@yosifkit I switch postgres apt url to stretch repo, and it worked well! thanks for your help!