Entrypoint script for runtime config is a universal story for werf and docker. There is no difference between these two.
Werf uses Ansible as a declarative way to build images, not to configure them in runtime. Werf also supports shell scripts for builds.
The main advantages over usual docker build are:
- git history is used to determine what should be run to build image. This can be used to greatly speed up build process on changes.
- mounts of external directories to reduce image size without "apt-get update && rm -rf /var/lib/apt".
- templating in build configuration file (werf.yaml).
