fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/property-information/lib/util/schema.js

@@ -0,0 +1,29 @@
+/**
+ * @import {Schema as SchemaType, Space} from 'property-information'
+ */
+
+/** @type {SchemaType} */
+export class Schema {
+  /**
+   * @param {SchemaType['property']} property
+   *   Property.
+   * @param {SchemaType['normal']} normal
+   *   Normal.
+   * @param {Space | undefined} [space]
+   *   Space.
+   * @returns
+   *   Schema.
+   */
+  constructor(property, normal, space) {
+    this.normal = normal
+    this.property = property
+
+    if (space) {
+      this.space = space
+    }
+  }
+}
+
+Schema.prototype.normal = {}
+Schema.prototype.property = {}
+Schema.prototype.space = undefined