Add deployment infrastructure and TUI showcase guide

Dockerfile (multi-stage: base/dev/build/prod with caddy:2-alpine),
docker-compose.yml with caddy-docker-proxy labels for birdcage.warehack.ing,
Caddyfile, Makefile (up/down/dev/prod/clean), and .env.

TUI guide page with 4 screenshots (F1 position, F2 signal, F4 system,
F5 console), demo mode docs, and project backstory crediting Gabe Emerson
(KL1FI) and Chris Davidson.

Makefile

@@ -0,0 +1,27 @@
+.PHONY: up down logs rebuild dev prod clean
+
+up:
+	docker compose up -d --build
+
+down:
+	docker compose down
+
+logs:
+	docker compose logs -f
+
+rebuild:
+	docker compose down
+	docker compose up -d --build
+
+dev:
+	@sed -i 's/^APP_ENV=.*/APP_ENV=dev/' .env
+	@sed -i 's/^APP_PORT=.*/APP_PORT=4321/' .env
+	$(MAKE) rebuild
+
+prod:
+	@sed -i 's/^APP_ENV=.*/APP_ENV=prod/' .env
+	@sed -i 's/^APP_PORT=.*/APP_PORT=80/' .env
+	$(MAKE) rebuild
+
+clean:
+	docker compose down --rmi local -v