We respect some healthy paranoia about suspicious warnings browsers will raise for sites protected by self-signed certificates Here we offer some points to reassure you that it is safe to proceed.
Visit http://readme.localtest.me 
to learn how that domain works. It's a really clever trick that dovetails nicely with wiki farms by providing a wildcard domain name that points at localhost.
# you can be extra sure, if you like, by checking that the DNS records do indeed point to your localhost, 127.0.0.1: dig +short localtest.me dig +short anything-you-like.localtest.me # once you have granted your browser permission to proceed, you can watch the logs of the TLS proxy service while visiting https://localtest.me docker-compose logs -f proxy