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/hast-util-whitespace/lib/index.d.ts

@@ -0,0 +1,13 @@
+/**
+ * Check if the given value is *inter-element whitespace*.
+ *
+ * @param {Nodes | string} thing
+ *   Thing to check (`Node` or `string`).
+ * @returns {boolean}
+ *   Whether the `value` is inter-element whitespace (`boolean`): consisting of
+ *   zero or more of space, tab (`\t`), line feed (`\n`), carriage return
+ *   (`\r`), or form feed (`\f`); if a node is passed it must be a `Text` node,
+ *   whose `value` field is checked.
+ */
+export function whitespace(thing: Nodes | string): boolean;
+export type Nodes = import('hast').Nodes;

node_modules/hast-util-whitespace/lib/index.js

@@ -0,0 +1,34 @@
+/**
+ * @typedef {import('hast').Nodes} Nodes
+ */
+
+// HTML whitespace expression.
+// See <https://infra.spec.whatwg.org/#ascii-whitespace>.
+const re = /[ \t\n\f\r]/g
+
+/**
+ * Check if the given value is *inter-element whitespace*.
+ *
+ * @param {Nodes | string} thing
+ *   Thing to check (`Node` or `string`).
+ * @returns {boolean}
+ *   Whether the `value` is inter-element whitespace (`boolean`): consisting of
+ *   zero or more of space, tab (`\t`), line feed (`\n`), carriage return
+ *   (`\r`), or form feed (`\f`); if a node is passed it must be a `Text` node,
+ *   whose `value` field is checked.
+ */
+export function whitespace(thing) {
+  return typeof thing === 'object'
+    ? thing.type === 'text'
+      ? empty(thing.value)
+      : false
+    : empty(thing)
+}
+
+/**
+ * @param {string} value
+ * @returns {boolean}
+ */
+function empty(value) {
+  return value.replace(re, '') === ''
+}