How to use local proxy settings in docker-compose

Question

I am setting up a new server for our Redmine installation, since the old installation was done by hand, which makes it difficult to update everything properly. I decided to

Answer 1

For the proxy server which requires username and password for authentication: Apart from adding the credentials in /etc/systemd/system/docker.service.d/http-proxy.conf, as suggested in this answer, I also had to add the same to the Dockerfile. Following is a snippet from the Dockerfile.

FROM ubuntu:16.04

ENV http_proxy http://username:password@proxy_url:proxy_port
ENV https_proxy http://username:password@proxy_url:proxy_port

RUN apt-get update \
    && apt-get upgrade -y \
    && apt-get install -y \
    build-essential \
    bla bla bla ...