add convert utility from imagemagick for image transformations

achempion · achempion · commit bed1b3e714e8 · 2019-08-27T21:10:28.000+03:00
diff --git a/Dockerfile.codeship b/Dockerfile.codeship
@@ -1,5 +1,8 @@
 FROM elixir:1.9.1-alpine
 
+# add `convert` utility from imagemagick for image transformations
+RUN apk add --no-cache imagemagick
+
 RUN mix local.hex --force && \
     mix local.rebar --force
 
