# Deployment Guide (OpenStack + Docker)

This guide deploys the Next.js app as a Docker container on a private OpenStack environment.

## 1) Prerequisites

- OpenStack project with a VM (Ubuntu 22.04 or similar)
- Docker Engine installed on the VM
- A PostgreSQL database reachable from the VM
- A blockchain RPC endpoint (Sepolia or private chain)
- A deployed DocumentRegistry contract address

## 2) Build the Docker image (local or CI)

From the project root:

```
docker build -t lexichain-app:latest .
```

Optionally tag and push to your private registry.

## 3) Runtime environment variables

Create a file named `lexichain.env` on the VM with the required secrets.
Example (fill with your real values):

```
NODE_ENV=production
PORT=3000
DATABASE_URL=postgresql://USER:PASSWORD@HOST:PORT/DBNAME
CLERK_PUBLISHABLE_KEY=...
CLERK_SECRET_KEY=...
CLERK_WEBHOOK_SECRET=...
UPLOADTHING_SECRET=...
UPLOADTHING_APP_ID=...
GOOGLE_AI_API_KEY=...
BLOCKCHAIN_NETWORK=sepolia
BLOCKCHAIN_RPC_URL=https://...
BLOCKCHAIN_CONTRACT_ADDRESS=0x...
BLOCKCHAIN_PRIVATE_KEY=0x...
```

If you use a private chain, set `BLOCKCHAIN_NETWORK` accordingly.

## 4) Run the container on the VM

```
docker run -d \
  --name lexichain-app \
  --restart unless-stopped \
  --env-file /path/to/lexichain.env \
  -p 3000:3000 \
  lexichain-app:latest
```

## 5) Database migration (first deploy)

Run migrations from the container image (or from CI) before first launch:

```
docker run --rm \
  --env-file /path/to/lexichain.env \
  lexichain-app:latest \
  npx prisma migrate deploy
```

## 6) OpenStack security group / firewall

Allow inbound traffic to port 3000 from your internal network or from the reverse proxy.

## 7) Optional: reverse proxy

Place Nginx or HAProxy in front of the app for TLS termination and HTTP/2.

## 8) Health check

Open `http://<vm-ip>:3000` and validate:

- Sign-in flow
- Upload + AI analysis
- Blockchain explorer stats
- Document verification

## 9) Update / rollout

- Build a new image and push to your registry.
- Pull on the VM and restart the container:

```
docker pull registry.example.com/lexichain-app:latest

docker stop lexichain-app

docker rm lexichain-app

docker run -d \
  --name lexichain-app \
  --restart unless-stopped \
  --env-file /path/to/lexichain.env \
  -p 3000:3000 \
  registry.example.com/lexichain-app:latest
```
