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/mdast-util-to-hast/lib/handlers/image.js

@@ -0,0 +1,35 @@
+/**
+ * @import {Element, Properties} from 'hast'
+ * @import {Image} from 'mdast'
+ * @import {State} from '../state.js'
+ */
+
+import {normalizeUri} from 'micromark-util-sanitize-uri'
+
+/**
+ * Turn an mdast `image` node into hast.
+ *
+ * @param {State} state
+ *   Info passed around.
+ * @param {Image} node
+ *   mdast node.
+ * @returns {Element}
+ *   hast node.
+ */
+export function image(state, node) {
+  /** @type {Properties} */
+  const properties = {src: normalizeUri(node.url)}
+
+  if (node.alt !== null && node.alt !== undefined) {
+    properties.alt = node.alt
+  }
+
+  if (node.title !== null && node.title !== undefined) {
+    properties.title = node.title
+  }
+
+  /** @type {Element} */
+  const result = {type: 'element', tagName: 'img', properties, children: []}
+  state.patch(node, result)
+  return state.applyData(node, result)
+}