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/micromark-core-commonmark/lib/blank-line.js

@@ -0,0 +1,61 @@
+/**
+ * @import {
+ *   Construct,
+ *   State,
+ *   TokenizeContext,
+ *   Tokenizer
+ * } from 'micromark-util-types'
+ */
+
+import { factorySpace } from 'micromark-factory-space';
+import { markdownLineEnding, markdownSpace } from 'micromark-util-character';
+/** @type {Construct} */
+export const blankLine = {
+  partial: true,
+  tokenize: tokenizeBlankLine
+};
+
+/**
+ * @this {TokenizeContext}
+ *   Context.
+ * @type {Tokenizer}
+ */
+function tokenizeBlankLine(effects, ok, nok) {
+  return start;
+
+  /**
+   * Start of blank line.
+   *
+   * > 👉 **Note**: `␠` represents a space character.
+   *
+   * ```markdown
+   * > | ␠␠␊
+   *     ^
+   * > | ␊
+   *     ^
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    return markdownSpace(code) ? factorySpace(effects, after, "linePrefix")(code) : after(code);
+  }
+
+  /**
+   * At eof/eol, after optional whitespace.
+   *
+   * > 👉 **Note**: `␠` represents a space character.
+   *
+   * ```markdown
+   * > | ␠␠␊
+   *       ^
+   * > | ␊
+   *     ^
+   * ```
+   *
+   * @type {State}
+   */
+  function after(code) {
+    return code === null || markdownLineEnding(code) ? ok(code) : nok(code);
+  }
+}