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/astro/dist/cli/db/index.js

@@ -0,0 +1,25 @@
+import { resolveConfig } from "../../core/config/config.js";
+import { createLoggerFromFlags, flagsToAstroInlineConfig } from "../flags.js";
+import { getPackage } from "../install-package.js";
+async function db({ flags }) {
+  const logger = createLoggerFromFlags(flags);
+  const getPackageOpts = {
+    skipAsk: !!flags.yes || !!flags.y,
+    cwd: flags.root
+  };
+  const dbPackage = await getPackage("@astrojs/db", logger, getPackageOpts, []);
+  if (!dbPackage) {
+    logger.error(
+      "check",
+      "The `@astrojs/db` package is required for this command to work. Please manually install it in your project and try again."
+    );
+    return;
+  }
+  const { cli } = dbPackage;
+  const inlineConfig = flagsToAstroInlineConfig(flags);
+  const { astroConfig } = await resolveConfig(inlineConfig, "build");
+  await cli({ flags, config: astroConfig });
+}
+export {
+  db
+};