This is a debugging tool for examining the environment that a process is launched in, e.g. by Docker, systemd, supervisor, or some other process manager.

Since a likely use case is to check that secrets are successfully passed in,

NEVER EXPOSE THIS TO THE PUBLIC INTERNET.

Environments usually contain sensitive information whether the operator deliberately added any or not.

It is highly recommended to bind to localhost and a firewalled port, access the web output only on the same local machine, and terminate the process immediately after gathering the needed env data.

While running, the following pages are served:
/args -- The ARGV elements from the process's invocation
/env -- The process's environment variables
/headers -- Request headers received
/process -- The PID (process ID) and PPID (parent PID)
/ (all others) -- This document