# Dexar Market - Deployment Guide

## Prerequisites
- Ubuntu/Debian server with root access
- Domain: dexarmarket.ru
- Node.js 18+ installed

## Quick Deployment

### 1. Build locally
```bash
npm install
npm run build
```
Output: `dist/dexarmarket/browser/`

**VERIFY BUILD LOCALLY:**
```bash
cd dist/dexarmarket/browser
ls -la
```
You MUST see `index.html`, chunk files, `assets/` folder, etc.

### 2. Upload to server
```bash
scp -r dist/dexarmarket/browser/* user@your-server:/var/www/dexarmarket/browser/
```

### 3. Set permissions on server
```bash
sudo chown -R www-data:www-data /var/www/dexarmarket
sudo chmod -R 755 /var/www/dexarmarket
sudo nginx -t
sudo systemctl reload nginx
```

## Initial Server Setup (one-time)

### Install and configure Nginx
```bash
sudo apt update
sudo apt install nginx -y
sudo mkdir -p /var/www/dexarmarket/browser
```

Copy `nginx.conf` content to `/etc/nginx/sites-available/dexarmarket`:
```bash
sudo nano /etc/nginx/sites-available/dexarmarket
```

Then enable it:
```bash
sudo ln -s /etc/nginx/sites-available/dexarmarket /etc/nginx/sites-enabled/
sudo rm /etc/nginx/sites-enabled/default
sudo nginx -t
sudo systemctl reload nginx
```

### Setup SSL (recommended)
```bash
sudo apt install certbot python3-certbot-nginx -y
sudo certbot --nginx -d dexarmarket.ru -d www.dexarmarket.ru
```

## Common Issues & Solutions

### ❌ 404 Error - Files Not Found

**Check 1: Verify files on server**
```bash
ls -la /var/www/dexarmarket/browser/
```
Should show: `index.html`, `chunk-*.js`, `assets/`, etc.

**If empty:**
```bash
# Re-upload files
scp -r dist/dexarmarket/browser/* user@your-server:/var/www/dexarmarket/browser/
```

**Check 2: Verify permissions**
```bash
namei -l /var/www/dexarmarket/browser/index.html
```
All directories need `x` (execute) permission.

**Fix permissions:**
```bash
sudo chown -R www-data:www-data /var/www/dexarmarket
sudo chmod -R 755 /var/www/dexarmarket
```

**Check 3: Test nginx config**
```bash
sudo nginx -t
```
Should say "syntax is ok" and "test is successful".

**Check 4: View nginx error log**
```bash
sudo tail -f /var/log/nginx/error.log
```
This shows the actual error!

### ❌ 502 Bad Gateway - API Issues

**This means the API backend is down or unreachable.**

**Check 1: Is API accessible?**
```bash
curl -v https://api.dexarmarket.ru:445/ping
```

**Check 2: Port 445 problem**
Port 445 is unusual for HTTPS and may be blocked by firewalls. Standard HTTPS uses port 443.

**Check 3: CORS issues**
The API must allow requests from `https://dexarmarket.ru`. Check API CORS configuration.

**Check 4: SSL certificate**
```bash
curl -k https://api.dexarmarket.ru:445/ping
```
If this works but without `-k` doesn't, SSL cert is invalid.

### ✅ Final Verification Checklist

On server, run all these:
```bash
# 1. Files exist
ls -la /var/www/dexarmarket/browser/index.html

# 2. Nginx config is valid
sudo nginx -t

# 3. Nginx is running
sudo systemctl status nginx

# 4. Site is enabled
ls -la /etc/nginx/sites-enabled/ | grep dexarmarket

# 5. Test API from server
curl -v https://api.dexarmarket.ru:445/ping

# 6. Check logs
sudo tail -20 /var/log/nginx/error.log
sudo tail -20 /var/log/nginx/access.log
```

### Debug Steps

If still having issues:
1. Check browser console (F12 → Console tab) - shows JavaScript errors
2. Check browser network tab (F12 → Network tab) - shows failed requests
3. Check exact error message in nginx logs
4. Test locally: `cd dist/dexarmarket/browser && python3 -m http.server 8000`