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

.gitignore

@@ -32,6 +32,7 @@ yarn-error.log*
 
 # env files (can opt-in for committing if needed)
 .env*
+!.env.example
 
 # vercel
 .vercel
@@ -39,3 +40,10 @@ yarn-error.log*
 # typescript
 *.tsbuildinfo
 next-env.d.ts
+
+# Docker
+docker-compose.override.yml
+
+# User data (encrypted local storage)
+data/*
+!data/.gitignore