Elixir Phoenix with Dart Sass

Docker image suitable for local development and compiling Elixir applications for ARM64 architecture. Tested with docker-in-docker CI for GitLab.

Docker Hub Registry

You can pull this image from the Docker Hub Registry:

docker pull lucidmodules/docker-elixir-phoenix-dart-sass:latest

Link to the lucidmodules/docker-elixir-phoenix-dart-sass container repository.

Configuration and usage

There is a Dart Sass library for Elixir Phoenix: https://github.com/CargoSense/dart_sass

It doesn't support precompiled Dart/Sass unless it is directly downloaded from the main branch. In your mix.exs add:

{:dart_sass, git: "https://github.com/CargoSense/dart_sass", runtime: Mix.env() == :dev}

in the config.exs, specify paths for the Dart and Sass as environment variables:

config :dart_sass,
  sass_path: System.get_env("MIX_SASS_PATH"),
  dart_path: System.get_env("MIX_SASS_DART_PATH"),

You can preview dart and sass location using these commands:

• which dart
• which sass

As for the latest version of this image, these are default locations where sass and dart are installed:

• /root/.pub-cache/bin/sass
• /usr/lib/dart/bin/dart