Add standalone docker-compose.yml

Self-contained Docker setup for SmartTools with no external dependencies.
Includes cli, test, and shell services.

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

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

docker-compose.yml

@@ -0,0 +1,70 @@
+# SmartTools - AI-powered CLI command builder
+#
+# Quick Start:
+#   docker-compose build          # Build the image
+#   docker-compose run --rm test  # Run tests
+#   docker-compose run --rm cli smarttools list
+#
+# This is a standalone project with no external dependencies.
+
+version: '3.8'
+
+services:
+  # ============================================================================
+  # Main CLI
+  # ============================================================================
+  cli:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: smarttools:latest
+    volumes:
+      - smarttools-data:/root/.smarttools
+    command: ["smarttools", "--help"]
+
+  # ============================================================================
+  # Tests
+  # ============================================================================
+  test:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: smarttools:latest
+    volumes:
+      - smarttools-data:/root/.smarttools
+    command: ["pytest", "-v"]
+
+  # ============================================================================
+  # Interactive Shell
+  # ============================================================================
+  shell:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: smarttools:latest
+    volumes:
+      - smarttools-data:/root/.smarttools
+    command: ["/bin/bash"]
+    stdin_open: true
+    tty: true
+
+volumes:
+  smarttools-data:
+    # Persists ~/.smarttools between container runs
+
+# ==============================================================================
+# Usage Examples
+# ==============================================================================
+#
+# Build:
+#   docker-compose build
+#
+# Run tests:
+#   docker-compose run --rm test
+#
+# Use CLI:
+#   docker-compose run --rm cli smarttools list
+#   docker-compose run --rm cli smarttools run hello-world
+#
+# Interactive shell:
+#   docker-compose run --rm shell