feat: Fix product tables and responsive fonts

- Add product detail page ([slug].astro) with table rendering
- Display productTables from site-config.ts on product pages
- Add responsive font scaling for large screens (1280px+)
- Base font scales from 16px to 24px on 4K displays
- All text elements use responsive sizing (md/lg/xl breakpoints)
- Tables styled with green headers and alternating rows
- Add comprehensive documentation (FIXES_SUMMARY.md)

Fixes:
- Product specification tables now visible on product pages
- Font too small on large screens - now responsive

dealplustech-astro/.dockerignore

@@ -0,0 +1,10 @@
+# See https://docs.docker.com/desktop/extensions-sdk/extensions/ignore/ for more details.
+node_modules
+dist
+*.log
+.git
+.gitignore
+README.md
+.env
+.env.*
+!node_modules/.dockerignore