fix: Update application port from 8000 to 9090 in configuration and deployment files

README.md

@@ -265,6 +265,65 @@ Important:
 
 - [docker-compose.yml](docker-compose.yml) uses `git.allucanget.biz/allucanget/arbitrade:latest` as the default image reference.
 
+## Coolify Deployment (Nixpacks)
+
+Use this when deploying directly from Git in Coolify without the Dockerfile path.
+
+### 1) Create application in Coolify
+
+- In Coolify, create a new `Application` from your Git repository.
+- Branch: `main` (or your release branch).
+- Build Pack: `Nixpacks`.
+- Root Directory: `.`
+
+### 2) Configure build and start behavior
+
+Set these in Coolify application settings:
+
+- Build Command: leave empty (let Nixpacks auto-detect Python).
+- Install Command: leave empty (Nixpacks will install from `pyproject.toml`, which reads `requirements/latest-runtime.in`).
+- Start Command: `python -m arbitrade.main`
+- Port: `8000`
+
+### 3) Configure health check and networking
+
+- Health Check Path: `/health`
+- Exposed Port: `8000`
+- Use Coolify-generated domain or attach your own domain.
+
+### 4) Configure persistent storage
+
+Add a persistent volume in Coolify:
+
+- Mount Path: `/app/data`
+
+This preserves DuckDB and other runtime artifacts across restarts/redeploys.
+
+### 5) Configure environment variables
+
+Add runtime environment variables in Coolify (UI: Environment Variables):
+
+- `APP_ENV=prod`
+- `APP_HOST=0.0.0.0`
+- `APP_PORT=8000`
+- `DUCKDB_PATH=/app/data/arbitrade.duckdb`
+- `LOG_LEVEL=INFO`
+- `LOG_JSON=true`
+- `KRAKEN_API_KEY=...`
+- `KRAKEN_API_SECRET=...`
+- `KRAKEN_API_KEY_PERMISSIONS=query,trade`
+
+Recommended:
+
+- Configure `FERNET_KEY` in Coolify secrets (do not commit it).
+- Keep all exchange keys/secrets in Coolify secret variables only.
+
+### 6) Deploy and verify
+
+- Trigger deploy in Coolify.
+- Verify app boot logs show startup completed.
+- Verify `GET /health` returns success on deployed URL.
+
 ## Gitea CI / Registry Setup
 
 CI file: