Add Docker deployment infrastructure for docs-site

docs-site/.dockerignore

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+node_modules
+dist
+.env

docs-site/.env.example

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+COMPOSE_PROJECT_NAME=mcmqtt-docs
+DOMAIN=mcmqtt.warehack.ing

docs-site/Caddyfile.prod

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+:80 {
+	encode gzip
+
+	handle {
+		root * /srv
+		try_files {path} {path}/ /index.html
+		file_server
+	}
+}

docs-site/Dockerfile

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+# Build stage
+FROM node:22-alpine AS builder
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+COPY . .
+ENV ASTRO_TELEMETRY_DISABLED=1
+RUN npm run build
+
+# Serve stage
+FROM caddy:2-alpine
+COPY --from=builder /app/dist /srv
+COPY Caddyfile.prod /etc/caddy/Caddyfile

docs-site/Makefile

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+.PHONY: up down logs restart
+
+up:
+	docker compose up -d --build
+	@sleep 3
+	docker compose logs --tail=20
+
+down:
+	docker compose down
+
+logs:
+	docker compose logs -f
+
+restart: down up

docs-site/docker-compose.yml

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+services:
+  docs:
+    build: .
+    restart: unless-stopped
+    networks:
+      - caddy
+    labels:
+      caddy: ${DOMAIN:-mcmqtt.warehack.ing}
+      caddy.reverse_proxy: "{{upstreams 80}}"
+
+networks:
+  caddy:
+    external: true