Some thoughts on the ordering of instructions in the Dockerfile: FROM motemen/mod_perl:5.36.0-2.4.58-2.0.13 # Run apt first, so layers can be reused if the

Some thoughts on the ordering of instructions in the Dockerfile: FROM motemen/mod_perl:5.36.0-2.4.58-2.0.13 # Run apt first, so layers can be reused if the image is built often, do not include package lists RUN apt-get update -y && apt-get install -y wget make build-essential \ && rm -rf /var/lib/apt/lists/* # Installing modules/packages might also be done in the beginning (as long as they don't need other files in place) # If you ever need something like package.json/pom.xml/Gemfile/requirements.txt etc., COPY those first) RUN cpan -iT Plack Mojolicious # Bigger dependencies that change less frequently can go first, for caching COPY lib /usr/local/apache2/lib # The rest of the configuration and app files COPY app.psgi /app.psgi COPY httpd.conf /usr/local/apache2/conf/httpd.conf COPY mojolicious.conf /usr/local/apache2/conf/mojolicious.conf EXPOSE 80 CMD ["httpd-foreground"] From: https://docs.docker.com/build/cache/ https://docs.docker.com/build/cache/ (probably not super important unless you're doing a lot of stuff, but sometimes useful)