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/dev/index.js

@@ -0,0 +1,36 @@
+import colors from "piccolore";
+import devServer from "../../core/dev/index.js";
+import { printHelp } from "../../core/messages.js";
+import { flagsToAstroInlineConfig } from "../flags.js";
+async function dev({ flags }) {
+  if (flags.help || flags.h) {
+    printHelp({
+      commandName: "astro dev",
+      usage: "[...flags]",
+      tables: {
+        Flags: [
+          ["--mode", `Specify the mode of the project. Defaults to "development".`],
+          ["--port", `Specify which port to run on. Defaults to 4321.`],
+          ["--host", `Listen on all addresses, including LAN and public addresses.`],
+          ["--host <custom-address>", `Expose on a network IP address at <custom-address>`],
+          ["--open", "Automatically open the app in the browser on server start"],
+          ["--force", "Clear the content layer cache, forcing a full rebuild."],
+          [
+            "--allowed-hosts",
+            "Specify a comma-separated list of allowed hosts or allow any hostname."
+          ],
+          ["--help (-h)", "See all available flags."]
+        ]
+      },
+      description: `Check ${colors.cyan(
+        "https://docs.astro.build/en/reference/cli-reference/#astro-dev"
+      )} for more information.`
+    });
+    return;
+  }
+  const inlineConfig = flagsToAstroInlineConfig(flags);
+  return await devServer(inlineConfig);
+}
+export {
+  dev
+};