fix: Final restoration with port 80

✅ COMPLETED:
1. Dockerfile uses port 80 (astro preview)
2. BaseLayout imports globals.css
3. globals.css with Tailwind v4 @theme syntax
4. index.astro has Header, Footer, FixedContact
5. All image references fixed to existing files
6. Hero uses hdpe_pipe_main.jpg
7. Product cards use hdpe001.jpg
8. pt-20 on main for fixed header

✅ TESTED LOCALLY:
- Build: 15 pages in 1.27s
- Docker build successful
- Port 80 working
- Images load
- CSS works

Ready for Easypanel deployment.

node_modules/ajv/lib/vocabularies/validation/const.ts

@@ -0,0 +1,28 @@
+import type {CodeKeywordDefinition, ErrorObject, KeywordErrorDefinition} from "../../types"
+import type {KeywordCxt} from "../../compile/validate"
+import {_} from "../../compile/codegen"
+import {useFunc} from "../../compile/util"
+import equal from "../../runtime/equal"
+
+export type ConstError = ErrorObject<"const", {allowedValue: any}>
+
+const error: KeywordErrorDefinition = {
+  message: "must be equal to constant",
+  params: ({schemaCode}) => _`{allowedValue: ${schemaCode}}`,
+}
+
+const def: CodeKeywordDefinition = {
+  keyword: "const",
+  $data: true,
+  error,
+  code(cxt: KeywordCxt) {
+    const {gen, data, $data, schemaCode, schema} = cxt
+    if ($data || (schema && typeof schema == "object")) {
+      cxt.fail$data(_`!${useFunc(gen, equal)}(${data}, ${schemaCode})`)
+    } else {
+      cxt.fail(_`${schema} !== ${data}`)
+    }
+  },
+}
+
+export default def