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/.runkit_example.js

@@ -0,0 +1,23 @@
+const Ajv = require("ajv")
+const ajv = new Ajv({allErrors: true})
+
+const schema = {
+  type: "object",
+  properties: {
+    foo: {type: "string"},
+    bar: {type: "number", maximum: 3},
+  },
+  required: ["foo", "bar"],
+  additionalProperties: false,
+}
+
+const validate = ajv.compile(schema)
+
+test({foo: "abc", bar: 2})
+test({foo: 2, bar: 4})
+
+function test(data) {
+  const valid = validate(data)
+  if (valid) console.log("Valid!")
+  else console.log("Invalid: " + ajv.errorsText(validate.errors))
+}