feat(deploy): add 1-click server setup script setup.sh

setup.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+set -e
+
+echo "==> [1/5] Installing system dependencies (ffmpeg, zram-tools, curl)..."
+apt-get update -qq
+apt-get install -y -qq ffmpeg zram-tools curl
+
+echo "==> [2/5] Downloading optimized just-download Rust binary..."
+curl -sL https://github.com/oiupoyt/just-download/releases/download/v2.0.0/just-download-backend -o /usr/local/bin/just-download-backend
+chmod +x /usr/local/bin/just-download-backend
+
+echo "==> [3/5] Downloading standalone yt-dlp binary..."
+curl -sL https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp -o /usr/local/bin/yt-dlp
+chmod +x /usr/local/bin/yt-dlp
+
+echo "==> [4/5] Configuring directories & systemd service..."
+mkdir -p /var/www/just-download/downloads
+
+cat << 'EOF' > /etc/systemd/system/just-download.service
+[Unit]
+Description=Just-Download Rust Backend Service
+After=network.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/var/www/just-download
+Environment=HOST=0.0.0.0
+Environment=PORT=8000
+Environment=DOWNLOAD_DIR=/var/www/just-download/downloads
+Environment=MAX_CONCURRENT_DOWNLOADS=2
+Environment=MAX_FILE_AGE_SECS=1800
+ExecStart=/usr/local/bin/just-download-backend
+Restart=always
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+echo "==> [5/5] Enabling and starting just-download service..."
+systemctl daemon-reload
+systemctl enable --now just-download
+systemctl restart just-download
+
+sleep 2
+if systemctl is-active --quiet just-download; then
+    echo "============================================================"
+    echo "✓ Success: just-download Rust backend is running on port 8000!"
+    echo "============================================================"
+    curl -s http://localhost:8000/health
+    echo ""
+else
+    echo "❌ Service failed to start. Logs:"
+    journalctl -u just-download -n 20 --no-pager
+fi