chore(部署): 增加 Docker 部署配置

关键改动：

- 新增本地和生产 Docker Compose、Web/Server Dockerfile 与 Nginx 模板

- 增加生产部署校验脚本、环境变量示例和 Prisma 初始迁移

- 更新部署文档、README 和架构/决策/流程/路线图说明

Co-Authored-By: Codex GPT-5 <codex@openai.com>

.env.production.example

@@ -0,0 +1,32 @@
+# Copy to .env.production on the server and replace every change-me value.
+
+COMPOSE_PROJECT_NAME=ftb_pm
+
+# Public entrypoint
+SERVER_NAME=pm.example.com
+HTTP_PORT=80
+CLIENT_MAX_BODY_SIZE=20m
+
+# Database
+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=change-me-strong-postgres-password
+POSTGRES_DB=ftb_pm
+DATABASE_URL=postgresql://postgres:change-me-strong-postgres-password@postgres:5432/ftb_pm
+
+# Redis
+REDIS_URL=redis://redis:6379
+
+# Web
+# For same-domain Nginx deployment, keep this relative path so browser requests go to /api/v1.
+NEXT_PUBLIC_API_URL=/api/v1
+NEXTAUTH_URL=https://pm.example.com
+NEXTAUTH_SECRET=change-me-random-32-byte-secret
+
+# AI provider fallback. Admins can also configure providers in /admin/ai-config.
+ANTHROPIC_API_KEY=sk-ant-xxx
+
+# Optional mail notification settings
+SMTP_HOST=
+SMTP_PORT=465
+SMTP_USER=
+SMTP_PASS=