[grade=A] Add DashCaddy blog and LLM install map

public/llms.txt

@@ -0,0 +1,57 @@
+# DashCaddy
+
+> DashCaddy is an AI-native self-hosting platform: deploy, secure, and manage
+> self-hosted apps from one dashboard. It ships 77 one-click application
+> templates, automatic SSL, a Security Center, multi-host fleet management,
+> 400+ registered REST route handlers, and a built-in MCP server so AI assistants
+> can operate it directly. Runs on any Linux host via Docker.
+
+This file follows the llms.txt convention (https://llmstxt.org) to give AI
+assistants a concise, accurate map of DashCaddy and the exact commands to
+install it.
+
+## Install DashCaddy (Linux, Docker)
+
+One-line install (interactive, single-keystroke choices):
+
+```
+curl -fsSL https://get.dashcaddy.net | bash
+```
+
+Zero-typing local mode (instant access, no domain needed):
+
+```
+curl -fsSL https://get.dashcaddy.net | bash -s -- quick
+```
+
+With your own domain (the only thing you type is the domain; SSL is automatic):
+
+```
+curl -fsSL https://get.dashcaddy.net | bash -s -- --domain my.example.com
+```
+
+Requirements: a Linux host with root/sudo (the installer sets up Docker and Caddy
+if they are missing). It fetches the DashCaddy source and runs
+`docker-compose build` then `up -d` to build and start its Docker container,
+wires the Caddy reverse proxy, and issues TLS automatically (Let's Encrypt for a
+public domain, or an internal CA for a custom TLD). Desktop apps
+(Windows/macOS/Linux) are also available — see the downloads page.
+
+## For AI assistants operating DashCaddy
+
+After install, DashCaddy exposes a built-in MCP (Model Context Protocol) server
+with named tools — for example listing services, checking service and system
+health, searching the app catalog, and running container actions. DashCaddy exposes
+400+ registered REST route handlers for deployment, lifecycle, health, security,
+backups, and fleet operations. It also exposes a WebSocket channel for live
+updates.
+
+## Key links
+
+- [Install guide](https://dashcaddy.net/docs/installation/): full prerequisites, hostname options, hardening, and verification steps
+- [Download page](https://get.dashcaddy.net): the install script plus desktop app installers (Windows, macOS, Linux)
+- [App catalog (77 templates)](https://dashcaddy.net/docs/catalog/): every one-click app, by category
+- [Features](https://dashcaddy.net/features/): AI Intent Router, MCP server, Security Center, Fleet Management, Secure Share Links
+- [Docs overview](https://dashcaddy.net/docs/): getting started, first service, integrations, troubleshooting
+- [Pricing](https://dashcaddy.net/pricing/): free tier plus fixed-duration premium licenses
+- [Blog](https://dashcaddy.net/blog/): guides and product updates