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/micromark/lib/initialize/flow.js

@@ -0,0 +1,58 @@
+/**
+ * @import {
+ *   InitialConstruct,
+ *   Initializer,
+ *   State,
+ *   TokenizeContext
+ * } from 'micromark-util-types'
+ */
+
+import { blankLine, content } from 'micromark-core-commonmark';
+import { factorySpace } from 'micromark-factory-space';
+import { markdownLineEnding } from 'micromark-util-character';
+/** @type {InitialConstruct} */
+export const flow = {
+  tokenize: initializeFlow
+};
+
+/**
+ * @this {TokenizeContext}
+ *   Self.
+ * @type {Initializer}
+ *   Initializer.
+ */
+function initializeFlow(effects) {
+  const self = this;
+  const initial = effects.attempt(
+  // Try to parse a blank line.
+  blankLine, atBlankEnding,
+  // Try to parse initial flow (essentially, only code).
+  effects.attempt(this.parser.constructs.flowInitial, afterConstruct, factorySpace(effects, effects.attempt(this.parser.constructs.flow, afterConstruct, effects.attempt(content, afterConstruct)), "linePrefix")));
+  return initial;
+
+  /** @type {State} */
+  function atBlankEnding(code) {
+    if (code === null) {
+      effects.consume(code);
+      return;
+    }
+    effects.enter("lineEndingBlank");
+    effects.consume(code);
+    effects.exit("lineEndingBlank");
+    self.currentConstruct = undefined;
+    return initial;
+  }
+
+  /** @type {State} */
+  function afterConstruct(code) {
+    if (code === null) {
+      effects.consume(code);
+      return;
+    }
+    effects.enter("lineEnding");
+    effects.consume(code);
+    effects.exit("lineEnding");
+    self.currentConstruct = undefined;
+    return initial;
+  }
+}