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/info/infra/cli-astro-config-resolver.js

@@ -0,0 +1,36 @@
+import { resolveConfig } from "../../../core/config/config.js";
+class CliAstroConfigResolver {
+  // TODO: find something better
+  #flags;
+  constructor({ flags }) {
+    this.#flags = flags;
+  }
+  async resolve() {
+    const { astroConfig } = await resolveConfig(
+      // TODO: consider testing flags => astro inline config
+      {
+        // Inline-only configs
+        configFile: typeof this.#flags.config === "string" ? this.#flags.config : void 0,
+        mode: typeof this.#flags.mode === "string" ? this.#flags.mode : void 0,
+        logLevel: this.#flags.verbose ? "debug" : this.#flags.silent ? "silent" : void 0,
+        force: this.#flags.force ? true : void 0,
+        // Astro user configs
+        root: typeof this.#flags.root === "string" ? this.#flags.root : void 0,
+        site: typeof this.#flags.site === "string" ? this.#flags.site : void 0,
+        base: typeof this.#flags.base === "string" ? this.#flags.base : void 0,
+        outDir: typeof this.#flags.outDir === "string" ? this.#flags.outDir : void 0,
+        server: {
+          port: typeof this.#flags.port === "number" ? this.#flags.port : void 0,
+          host: typeof this.#flags.host === "string" || typeof this.#flags.host === "boolean" ? this.#flags.host : void 0,
+          open: typeof this.#flags.open === "string" || typeof this.#flags.open === "boolean" ? this.#flags.open : void 0,
+          allowedHosts: typeof this.#flags.allowedHosts === "string" ? this.#flags.allowedHosts.split(",") : typeof this.#flags.allowedHosts === "boolean" && this.#flags.allowedHosts === true ? this.#flags.allowedHosts : []
+        }
+      },
+      "info"
+    );
+    return astroConfig;
+  }
+}
+export {
+  CliAstroConfigResolver
+};