ql-lg-server: Quake Live LG vampiric practice server in Docker

One-command setup (SteamCMD + minqlx build), .env settings with a
listed/unlisted switch, three factories (lgvamp, lgvamp_nolag, lgvamp100),
warmup-text and welcome minqlx plugins, watchdog/backup/daily-restart,
docs for admins and players.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

.env.example

@@ -0,0 +1,35 @@
+# ql-lg-server settings. setup.sh copies this to .env (and asks for the important ones).
+# After editing .env: docker compose up -d   (recreates the container with the new values)
+# No double quotes inside values.
+
+# Name shown in the server browser and the scoreboard (^1..^7 = Quake colors)
+QL_HOSTNAME=LG Vampiric FFA
+
+# yes = listed in the in-game server browser (forward UDP QL_PORT on your router/firewall)
+# no  = unlisted, people join by address (LAN, VPN like Tailscale, or a known IP)
+QL_LISTED=yes
+
+# Join password (empty = open server)
+QL_PASSWORD=
+
+QL_MAXCLIENTS=16
+
+# lgvamp       LG only, 1:1 vampiric, no knockback, antilag (like x76 "Antilag LG Duel")
+# lgvamp_nolag same without antilag (like x76 "LG Duel EU #3")
+# lgvamp100    spawn with flat 100 HP instead of 200 (no health decay above 100)
+QL_FACTORY=lgvamp
+QL_MAP=thunderstruck
+
+# Shown to every player when they join. Empty = no message.
+QL_WELCOME=^7Welcome! LG only, vampiric, no knockback. Pair up and duel, there is no match to ready up for.
+
+# Game port (UDP) and RCON port (TCP, bound to 127.0.0.1 only). Change both to run a second server.
+QL_PORT=27960
+QL_RCON_PORT=28960
+
+# Docker container name (unique per server on this machine)
+QL_NAME=ql-lg
+
+# User/group the server runs as (owner of this folder). setup.sh fills these in.
+QL_UID=1000
+QL_GID=1000