Add 'Try It Now' quick demo section to README

60-second demo using Docker container:
- Pull container, install OpenCode, run eli5 on README
- Uses free Big Pickle model by default, no sign-up required
- Demonstrates the tool while explaining itself

Keep native install as 'Quick Start (Native Install)' for regular use.

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

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

README.md

@@ -28,7 +28,30 @@ echo "Price $49.99, SKU ABC-123" | json-extract --fields "price, sku"
 - **Multi-step Pipelines** - Chain AI prompts with Python code for validation
 - **12+ Providers Profiled** - We tested them so you don't have to
 
-## Quick Start
+## Try It Now (60 seconds)
+
+See SmartTools in action without installing anything on your system:
+
+```bash
+# Pull the container
+docker pull gitea.brrd.tech/rob/smarttools:latest
+
+# Run it
+docker run -it --rm gitea.brrd.tech/rob/smarttools bash
+
+# Inside the container - install OpenCode (includes free AI models)
+smarttools providers install   # Select option 4, then 'y'
+source ~/.bashrc
+
+# Try it! This explains the README using the free Big Pickle model
+cat README.md | eli5
+```
+
+That's it - you just used AI to explain itself. The `eli5` tool uses a free model by default, no sign-up required.
+
+## Quick Start (Native Install)
+
+For regular use, install natively:
 
 ```bash
 # Clone and install