Add Docker deployment for ZimaOS

- Updated Dockerfile for local storage deployment (removed Firebase dependencies)
- Created docker-compose.yml with persistent data volumes
- Added deploy.sh script for automated deployment
- Created DEPLOYMENT.md with ZimaOS deployment guide
- Added .env.example for configuration template
- Updated .gitignore to protect sensitive data
- Fixed package.json to use port 7654 in production
- Cleared all test user data for fresh deployment
- Updated README with deployment section

.env.example

@@ -0,0 +1,11 @@
+# IMPORTANT: Generate a secure encryption key before deploying
+# Run: openssl rand -base64 32
+# Then replace the value below with your generated key
+
+ENCRYPTION_KEY=change-this-to-a-secure-random-key
+
+# Optional: Set custom port (default is 7654)
+# PORT=7654
+
+# Environment
+NODE_ENV=production