fix: resolve Turbopack build issues in CI environment

Problem:
- Turbopack file tracing caused by process.cwd() in upload.ts
- Google fonts download failures in CI network environment
- Module resolution errors for @vercel/turbopack-next

Solutions:
- Add turbopackIgnore comment to process.cwd() call
- Temporarily disable Google fonts to avoid network dependencies
- Use system fonts as fallback for CI builds
- Switch to node:20-alpine for faster SSH installation
- Add SSH debugging information

This should resolve the 493 build errors and enable successful CI deployment.

src/lib/upload.ts

@@ -4,7 +4,7 @@ import path from 'path';
 import { nanoid } from 'nanoid';
 
 function getWorkingDirectory(): string {
-  return process.cwd();
+  return /*turbopackIgnore: true*/ process.cwd();
 }
 
 function buildUploadPath(type: string, datePath: string): string {