Docker: npm install behind proxy : <p>I have this Dockerfile:</p>

<pre><code>FROM node:argon

ENV http_proxy http://user:pass@proxy.company.priv:3128
ENV https_proxy https://user:pass@proxy.company.priv:3128

RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app

# Install app dependencies
COPY package.json /usr/src/app/
RUN npm install

# Bundle app source
COPY . /usr/src/app

EXPOSE 8080
CMD [ "npm", "start" ]
</code></pre>

<p>But I get this error, in <strong>npm install</strong> step:</p>

<blockquote>
  <p>npm info it worked if it ends with ok npm info using npm@2.14.12 npm
  info using node@v4.2.6 npm WARN package.json deployer-ui@1.0.0 No
  description npm WARN package.json deployer-ui@1.0.0 No repository
  field. npm WARN package.json deployer-ui@1.0.0 No README data npm info
  preinstall deployer-ui@1.0.0 npm info attempt registry request try #1
  at 7:09:23 AM npm http request GET
  <a href="https://registry.npmjs.org/body-parser" rel="noreferrer">https://registry.npmjs.org/body-parser</a> npm info attempt registry
  request try #1 at 7:09:23 AM npm http request GET
  <a href="https://registry.npmjs.org/express" rel="noreferrer">https://registry.npmjs.org/express</a> npm info retry will retry, error on
  last attempt: Error: tunneling socket could not be established,
  cause=write EPROTO npm info retry will retry, error on last attempt:
  Error: tunneling socket could not be established, cause=write EPROTO</p>
</blockquote>

<p>I guess it is due to the proxy. I have also tried to put</p>

<pre><code>RUN npm config set proxy http://user:pass@proxy.company.priv:3128
RUN npm config set https-proxy http://user:pass@proxy.company.priv:3128
</code></pre>

<p>but still getting the same error.</p>

<p>Moreover, in my file <strong>/etc/systemd/system/docker.service.d/http-proxy.conf</strong> I have this:</p>

<pre><code>Environment="HTTP_PROXY=http://user:pass@proxy.company.priv:3128"
Environment="HTTPS_PROXY=https://user:pass@proxy.company.priv:3128"
</code></pre>

<p>Thanks in advance.</p>
