Add zlib-dev dep in dockerfile

Dockerfile

@@ -5,7 +5,7 @@ ARG FRONTEND_BRANCH=master
 ARG GITLAB_TOKEN="gTPA5UQYesSuKMCRM2r_"
 
 # Add system dependencies
-RUN apk add --update --no-cache postgresql-dev jpeg-dev build-base wget gzip
+RUN apk add --update --no-cache postgresql-dev jpeg-dev build-base wget gzip zlib-dev
 
 # Setup frontend
 ENV FRONTEND_DIR="/frontend/dist"