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/@zeit/schemas/README.md

@@ -0,0 +1,35 @@
+# Vercel Schemas
+
+Schemas used across many Vercel packages to validating config files, requests to APIs, and more.
+
+## Why?
+
+- Keep schemas used across Vercel projects in sync
+- We use `.js` instead of `.json` because parsing JSON takes longer
+
+## Usage
+
+To get started, pick one of the schemas in this repository and load it:
+
+```js
+const schema = require('@zeit/schemas/deployment/config');
+```
+
+Next, set up [AJV](https://github.com/epoberezkin/ajv) (the validator) and run the schema through it:
+
+```js
+const AJV = require('ajv');
+
+const ajv = new AJV({ allErrors: true });
+const isValid = ajv.validate(schema, <object-to-validate>);
+
+if (!isValid) {
+	console.error(`The following entries are wrong: ${JSON.stringify(ajv.errors)}`);
+}
+```
+
+That is all! :tada:
+
+## Contributing
+
+We are currently not accepting external contributions for this repository.