specify backend's deno config file and add run permission in build script

build.sh

@@ -28,7 +28,7 @@ function build_backend {
 function compile_for {
     target=$1
     mkdir -p "./dist/bin"
-    deno compile --target "$target" --output "./dist/bin/$target" --allow-net --allow-read --allow-write --allow-sys ./backend/src/main.ts
+    deno compile --config "./backend/deno.json" --target "$target" --output "./dist/bin/$target" --allow-net --allow-read --allow-write --allow-sys --allow-run ./backend/src/main.ts
 }
 
 function compile_all {