diff --git a/install.sh b/install.sh
index d61e888..a019805 100755
--- a/install.sh
+++ b/install.sh
@@ -3,7 +3,9 @@ set -euo pipefail
 
 # ──────────────────────────────────────────────
 #  worst-scan-web — Direct installer (no Docker)
-#  Usage: bash <(curl -fsSL https://gitea.cbcren.online/renato97/worst-scan-web/raw/branch/main/install.sh)
+#  Usage:
+#    screen -S worst-scan       # recommended — survives SSH drops
+#    bash <(curl -fsSL https://gitea.cbcren.online/renato97/worst-scan-web/raw/branch/main/install.sh)
 # ──────────────────────────────────────────────
 
 REPO_URL="https://gitea.cbcren.online/renato97/worst-scan-web.git"
@@ -134,31 +136,43 @@ fi
 mkdir -p "$INSTALL_DIR/data"
 log "Data directory ready"
 
-# ── Build ────────────────────────────────────────
-info "Installing npm dependencies..."
-cd "$INSTALL_DIR"
-npm ci
-log "Dependencies installed"
-
-info "Building Next.js app (this may take a few minutes)..."
-npm run build
-log "Build complete"
-
 STANDALONE_DIR="$INSTALL_DIR/.next/standalone"
 
-# Ensure static files are copied
-if [ ! -d "$STANDALONE_DIR/.next/static" ]; then
-  mkdir -p "$STANDALONE_DIR/.next"
-  cp -r "$INSTALL_DIR/.next/static" "$STANDALONE_DIR/.next/static"
+# ── Build (skip if already built) ──────────────────
+if [ -f "$STANDALONE_DIR/server.js" ]; then
+  info "Build already exists — skipping"
+else
+  info "Installing npm dependencies..."
+  cd "$INSTALL_DIR"
+  npm ci
+  log "Dependencies installed"
+
+  info "Building Next.js app (this may take a few minutes)..."
+  info "Tip: run in 'screen -S worst-scan' to survive SSH drops"
+  npm run build
+  log "Build complete"
+
+  # Ensure static files are copied
+  if [ ! -d "$STANDALONE_DIR/.next/static" ]; then
+    mkdir -p "$STANDALONE_DIR/.next"
+    cp -r "$INSTALL_DIR/.next/static" "$STANDALONE_DIR/.next/static"
+  fi
+  cp -r "$INSTALL_DIR/public" "$STANDALONE_DIR/public" 2>/dev/null || true
 fi
-cp -r "$INSTALL_DIR/public" "$STANDALONE_DIR/public" 2>/dev/null || true
 
 # ── systemd service ──────────────────────────────
 SERVICE_NAME="worst-scan-web"
 APP_USER="$USER"
 APP_HOME="$HOME"
 
-sudo tee "/etc/systemd/system/$SERVICE_NAME.service" > /dev/null <<SYSTEMD
+if [ -f "/etc/systemd/system/$SERVICE_NAME.service" ]; then
+  info "systemd service already exists — restarting"
+  sudo systemctl restart "$SERVICE_NAME"
+  sudo systemctl enable "$SERVICE_NAME" 2>/dev/null || true
+  log "systemd service $SERVICE_NAME restarted"
+else
+  info "Creating systemd service..."
+  sudo tee "/etc/systemd/system/$SERVICE_NAME.service" > /dev/null <<SYSTEMD
 [Unit]
 Description=worst-scan-web
 After=network.target
@@ -180,10 +194,11 @@ RestartSec=5
 WantedBy=multi-user.target
 SYSTEMD
 
-sudo systemctl daemon-reload
-sudo systemctl enable "$SERVICE_NAME"
-sudo systemctl restart "$SERVICE_NAME"
-log "systemd service $SERVICE_NAME started"
+  sudo systemctl daemon-reload
+  sudo systemctl enable "$SERVICE_NAME"
+  sudo systemctl restart "$SERVICE_NAME"
+  log "systemd service $SERVICE_NAME created and started"
+fi
 
 # ── Caddy reverse proxy ──────────────────────────
 CADDYFILE="/etc/caddy/Caddyfile"