docs: improve README, DEPLOYMENT and move CONTRIBUTING

- README: emphasize Docker requirement with get-started link, move silent
  install under one-click and de-emphasize
- DEPLOYMENT: clarify default config path and that only config file is mounted
- Move CONTRIBUTING.md to .github/CONTRIBUTING.md (git mv)

DEPLOYMENT.md

@@ -30,6 +30,10 @@ That's it. No containerd, nerdctl, or buildkit required on the host.
 
 ## Custom Configuration
 
+By default, Docker Compose uses `docker/config/config.docker.toml` (no file in project root is mounted; only this config file is mounted into the containers).
+
+To use your own config, create and edit it in the project root, then point `MEMOH_CONFIG` at it (path is on the host; run `docker compose` from the project root):
+
 ```bash
 cp docker/config/config.docker.toml config.toml
 nano config.toml

README.md

@@ -27,12 +27,14 @@ Memoh is a AI agent system platform. Users can create their own AI bots and chat
 
 ## Quick Start
 
-One-click install (requires Docker):
+One-click install (**requires [Docker](https://www.docker.com/get-started/)**):
 
 ```bash
 curl -fsSL https://raw.githubusercontent.com/memohai/Memoh/main/scripts/install.sh | sh
 ```
 
+*Silent install with all defaults: `curl -fsSL ... | sh -s -- -y`*
+
 Or manually:
 
 ```bash
@@ -43,8 +45,6 @@ docker compose up -d
 
 Visit http://localhost after startup. Default login: `admin` / `admin123`
 
-Silent install with all defaults: `curl -fsSL ... | sh -s -- -y`
-
 See [DEPLOYMENT.md](DEPLOYMENT.md) for custom configuration and production setup.
 
 ## Why Memoh?