update backend run

README.md

@@ -2,7 +2,10 @@
 
 ### run
 - frontend `bun dev --host` 
-- backend `cd ./backend-php/; ./dev.ps1` or `cat ./dev.ps1 | sh` if you are in other os
+- backend `cd ./backend-php/`
+  - make sure that you have `pdo_sqlite`
+  - oonix `chmod +x ./dev.sh` and then `./dev.sh`
+  - uindos `cat ./dev.sh | iex` in poersel
 
 ### IMPORTANT
 

backend-php/dev.sh

@@ -0,0 +1 @@
+php -S 0.0.0.0:8321