Make ngx script only write the config if run directly

bio-char-lt.ngx.ts

@@ -2,11 +2,15 @@
 
 import ngx from "https://char.lt/ngx/ngx.ts?v=1";
 
-ngx("server", [
+export const site = ngx("server", [
   [
     "server_name bio.char.lt",
     ...ngx.listen(),
     ...ngx.letsEncrypt("bio.char.lt"),
   ],
   ngx("location /", ["root /srv/http/bio.char.lt/public"]),
-]).write("/etc/nginx/http.d/bio-char-lt.conf");
+]);
+
+if (import.meta.main) {
+  site.write("/etc/nginx/http.d/bio-char-lt.conf");
+}