Ensure that package managers clean up

Every package manager should clean up after themselves in order to keep
docker layers neat and tiny:

apt (Debian/Ubuntu package manager):

 - unneeded dependencies are cleared (autoremove)
 - caches are cleaned (clean)
 - package lists are deleted

yum (CentOS package manager),
zypper (OpenSuse package manager)

 - should clear caches after installing dependencies

pip (Python package manager),
apk (Alpine package manager)

 - should use no cache for installing dependencies
This commit is contained in:
Lukas Eipert 2018-10-04 14:38:17 +02:00
parent 9fa4aa85c2
commit 5380948868
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19 changed files with 62 additions and 27 deletions

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@ -1,6 +1,6 @@
FROM ruby:2.4-alpine
RUN apk add --update build-base cmake git openssh-client
RUN apk add --update --no-cache build-base cmake git openssh-client
# Set UTF-8 http://jaredmarkell.com/docker-and-locales/
ENV LANG en_US.UTF-8