Replace MySQL with SQLite, fix Jinja2 template syntax, and add README

app/gather_info.sh

@@ -92,11 +92,11 @@ done
 
 # GPUs
 gpu_idx=0
-lspci 2>/dev/null | grep -iE 'vga|3d|display' | while read -r line; do
+while read -r line; do
     echo "[gpu:$gpu_idx]"
     echo "description=$line"
     gpu_idx=$((gpu_idx + 1))
-done
+done < <(lspci 2>/dev/null | grep -iE 'vga|3d|display')
 
 # Network interfaces
 for iface in $(ls /sys/class/net/ 2>/dev/null); do