Update README with pre-built Docker container and links

- Add Quick Start section with pre-built container option
- Add Docker section with pull instructions
- Add Links section (repository, Docker image, issues)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -15,10 +15,24 @@ A configurable GUI tool that lets users "ramble" about an idea and extracts stru
 - **Multiple providers** - Claude, Codex, Gemini, or mock for testing
 - **Headless mode** - Skip GUI, pass values directly via CLI
 
-## Installation
+## Quick Start
+
+### Option 1: Pre-built Docker Container
+
+```bash
+# Allow X11 access
+xhost +local:docker
+
+# Run the GUI with mock provider (no AI required)
+docker run -it --rm \
+  -e DISPLAY=$DISPLAY \
+  -v /tmp/.X11-unix:/tmp/.X11-unix \
+  gitea.brrd.tech/rob/ramble --provider mock
+```
+
+### Option 2: Native Install
 
 ```bash
-# Clone and install
 git clone https://gitea.brrd.tech/rob/ramble.git
 cd ramble
 pip install -e .
@@ -29,17 +43,31 @@ sudo apt install plantuml  # For diagram rendering
 
 ## Docker
 
-Run without installing anything locally:
+### Pre-built Image
+
+```bash
+# Pull the pre-built container
+docker pull gitea.brrd.tech/rob/ramble:latest
+
+# Run GUI (requires: xhost +local:docker)
+docker run -it --rm \
+  -e DISPLAY=$DISPLAY \
+  -v /tmp/.X11-unix:/tmp/.X11-unix \
+  gitea.brrd.tech/rob/ramble --provider mock
+
+# Headless mode
+docker run -it --rm gitea.brrd.tech/rob/ramble \
+  --field-values '{"Title":"MyApp","Summary":"A cool app"}'
+```
+
+### Build from Source
 
 ```bash
-# Clone the repo
 git clone https://gitea.brrd.tech/rob/ramble.git
 cd ramble
-
-# Build
 docker-compose build
 
-# Launch GUI (requires: xhost +local:docker)
+# Launch GUI
 docker-compose run --rm gui
 
 # Headless mode
@@ -158,6 +186,12 @@ ramble/
 └── pyproject.toml
 ```
 
+## Links
+
+- **Repository**: https://gitea.brrd.tech/rob/ramble
+- **Docker Image**: `gitea.brrd.tech/rob/ramble:latest`
+- **Issues**: https://gitea.brrd.tech/rob/ramble/issues
+
 ## License
 
 MIT