#001r3ctf-20261 skills50updated 2026-07-02100% of creatorskilloccupationdescriptionupdatedcreating-ctf-docker-challengessoftware-developersUse when building a Docker container for a CTF competition challenge that serves a network service and injects a dynamic flag via the $FLAG env var at deploy time. Covers Web/Pwn/Crypto/Misc/Blockchain/Forensics challenges, xinetd/socat/nsjail forwarding, chroot/jail sandboxes, flag-scrubbing, and the ctf-docker-template scaffold.2026-07-02