feat: add bootstrap script for auto-generated credentials on fresh install

.env.deploy

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+# Fresh Deployment Credentials
+# These will be auto-generated on first deployment
+# After deployment, check the Directus container logs for the actual credentials
+
+ADMIN_EMAIL=admin@sparkplatform.local
+DB_USER=sparkuser
+DB_DATABASE=directus

DEPLOY_INSTRUCTIONS.md

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+# Deployment Instructions
+
+## Fresh Install with Auto-Generated Credentials
+
+This deployment will automatically:
+1. Generate secure random passwords for all services
+2. Create the Directus admin user
+3. Save all credentials to a file you can retrieve
+
+### Deploy Steps:
+
+1. **In Coolify, set ONLY these environment variables:**
+   ```
+   ADMIN_EMAIL=admin@sparkplatform.local
+   DB_USER=sparkuser
+   DB_DATABASE=directus
+   ```
+
+2. **Deploy the application**
+
+3. **Retrieve your credentials:**
+   ```bash
+   docker exec <directus-container-name> cat /directus/credentials.txt
+   ```
+
+4. **Login to Directus:**
+   - URL: https://spark.jumpstartscaling.com
+   - Email: admin@sparkplatform.local
+   - Password: (from credentials.txt)
+
+### Security Note:
+All passwords are randomly generated using `openssl rand -base64` and are unique per deployment.

directus/scripts/bootstrap.sh

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+#!/bin/sh
+set -e
+
+# Generate random passwords if not set
+export ADMIN_PASSWORD=${ADMIN_PASSWORD:-$(openssl rand -base64 32)}
+export DB_PASSWORD=${DB_PASSWORD:-$(openssl rand -base64 32)}
+export KEY=${KEY:-$(openssl rand -base64 64)}
+export SECRET=${SECRET:-$(openssl rand -base64 64)}
+
+# Save credentials to a file for reference
+cat > /directus/credentials.txt <<EOF
+===========================================
+DIRECTUS ADMIN CREDENTIALS
+===========================================
+Admin Email: ${ADMIN_EMAIL}
+Admin Password: ${ADMIN_PASSWORD}
+
+Database User: ${DB_USER}
+Database Password: ${DB_PASSWORD}
+
+Directus Key: ${KEY}
+Directus Secret: ${SECRET}
+===========================================
+IMPORTANT: Save these credentials securely!
+===========================================
+EOF
+
+echo "✅ Credentials generated and saved to /directus/credentials.txt"
+cat /directus/credentials.txt
+
+# Start Directus
+exec node cli.js bootstrap && node cli.js start