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-rw-r--r--ci/Dockerfile7
1 files changed, 4 insertions, 3 deletions
diff --git a/ci/Dockerfile b/ci/Dockerfile
index e6a8b438c..ca28b7029 100644
--- a/ci/Dockerfile
+++ b/ci/Dockerfile
@@ -1,7 +1,8 @@
-FROM elixir:1.9.4
+FROM elixir:1.11.4
+# Single RUN statement, otherwise intermediate images are created
+# https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#run
RUN apt-get update &&\
- apt-get install -y libmagic-dev cmake libimage-exiftool-perl ffmpeg &&\
+ apt-get install -y libmagic-dev cmake libimage-exiftool-perl ffmpeg &&\
mix local.hex --force &&\
mix local.rebar --force
-