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This PR adds client auth support via simple HTTP basic auth. The flow here is:
CLIENT_AUTH_USER_FILE
ENV var is set to the htpasswd file path in the containerCLIENT_AUTH_USER_FILE
variable enables the client_auth.conf file in the nginx config, which configures basic auth via ngx_http_auth_basic_module.To pull from the registry clients must now auth with
docker login
using credentials from the htpasswd file. Unauthenticated clients will get a error.When
CLIENT_AUTH_USER_FILE
is unset (the default) application behavior is unchanged.This feature is useful in environments where having an open proxy that can pull from ECR is undesirable for security reasons.