refactor: Move Astro to root, use PORT env (default 80), allow all hosts

- Move Astro files from dealplustech-astro/ to project root
- Update Dockerfile: PORT environment variable (default 80)
- Add vite.config.ts with allowedHosts: true
- Matches nixpacks behavior for Easypanel deployment
- No hardcoded ports or domains

node_modules/astro/dist/cli/exec.js

@@ -0,0 +1,23 @@
+import { NonZeroExitError, x } from "tinyexec";
+function exec(command, args, options) {
+  return x(command, args, {
+    throwOnError: true,
+    ...options
+  }).then(
+    (o) => o,
+    (e) => {
+      if (e instanceof NonZeroExitError) {
+        const fullCommand = args?.length ? `${command} ${args.map((a) => a.includes(" ") ? `"${a}"` : a).join(" ")}` : command;
+        const message = `The command \`${fullCommand}\` exited with code ${e.exitCode}`;
+        const newError = new Error(message, e.cause ? { cause: e.cause } : void 0);
+        newError.stderr = e.output?.stderr;
+        newError.stdout = e.output?.stdout;
+        throw newError;
+      }
+      throw e;
+    }
+  );
+}
+export {
+  exec
+};