[tor] https://www.torproject.org/
[privoxy] https://www.privoxy.org/
docker build . -t tor-privoxy-rotating
docker run -d -p 8118:8118 -p 9050:9050 -p 9051:9051 tor-privoxy-rotating:latest && docker ps
curl --silent -x http://172.17.0.1:8118 https://check.torproject.org/ | grep -o -m1 "Congratulations. This browser is configured to use Tor."
curl --silent -x http://172.17.0.1:8118 https://check.torproject.org/ | grep -oP '(Your IP address appears to be:).*(<strong>.*</strong>)' | sed -r 's/<[^>]*>//g'