Speical Passwords for Proxy setting

There is issue when setting up the http_proxy environment variable on docker file with passwords contains @ sign , We tried both F40 or @ to bypass the issue but it did not work , any help .

ENV http_proxy 'http://user:password@proxy-host:proxy-port’
ENV https_proxy 'http://user:password@proxy-host:proxy-port’
ENV HTTP_PROXY 'http://user:password@proxy-host:proxy-port’
ENV HTTPS_PROXY ‘http://user:password@proxy-host:proxy-port’