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/runtime/server/render/head.js

@@ -0,0 +1,55 @@
+import { markHTMLString } from "../escape.js";
+import { renderCspContent } from "./csp.js";
+import { createRenderInstruction } from "./instruction.js";
+import { renderElement } from "./util.js";
+const uniqueElements = (item, index, all) => {
+  const props = JSON.stringify(item.props);
+  const children = item.children;
+  return index === all.findIndex((i) => JSON.stringify(i.props) === props && i.children == children);
+};
+function renderAllHeadContent(result) {
+  result._metadata.hasRenderedHead = true;
+  let content = "";
+  if (result.shouldInjectCspMetaTags && result.cspDestination === "meta") {
+    content += renderElement(
+      "meta",
+      {
+        props: {
+          "http-equiv": "content-security-policy",
+          content: renderCspContent(result)
+        },
+        children: ""
+      },
+      false
+    );
+  }
+  const styles = Array.from(result.styles).filter(uniqueElements).map(
+    (style) => style.props.rel === "stylesheet" ? renderElement("link", style) : renderElement("style", style)
+  );
+  result.styles.clear();
+  const scripts = Array.from(result.scripts).filter(uniqueElements).map((script) => {
+    if (result.userAssetsBase) {
+      script.props.src = (result.base === "/" ? "" : result.base) + result.userAssetsBase + script.props.src;
+    }
+    return renderElement("script", script, false);
+  });
+  const links = Array.from(result.links).filter(uniqueElements).map((link) => renderElement("link", link, false));
+  content += styles.join("\n") + links.join("\n") + scripts.join("\n");
+  if (result._metadata.extraHead.length > 0) {
+    for (const part of result._metadata.extraHead) {
+      content += part;
+    }
+  }
+  return markHTMLString(content);
+}
+function renderHead() {
+  return createRenderInstruction({ type: "head" });
+}
+function maybeRenderHead() {
+  return createRenderInstruction({ type: "maybe-head" });
+}
+export {
+  maybeRenderHead,
+  renderAllHeadContent,
+  renderHead
+};