v12.1.6-canary.16

Core Changes

• Fix missing Content-Length header from Image Optimization API: #36581
• Refactor Page Paths utils and Middleware Plugin: #36576
• Reexports styled-jsx JSXStyle in nextjs: #36585
• Update status code for normalize error: #36580
• Add pagesDir to Jest transformer: #36599

Documentation Changes

• Add docs about SSR caching (yes, you can do this with Next.js): #36588

Example Changes

• Fix typo: #36592

Credits

Huge thanks to @styfle, @javivelasco, @leerob, @ro11ingbutler, @huozhi, and @ijjk for helping!