feat: add trailingSlash middleware

apps/scandic-web/middlewares/trailingSlash.ts

@@ -0,0 +1,24 @@
+import { type NextMiddleware, NextResponse } from "next/server"
+
+import { getPublicNextURL } from "@/server/utils"
+
+import { getDefaultRequestHeaders } from "./utils"
+
+import type { MiddlewareMatcher } from "@/types/middleware"
+
+export const middleware: NextMiddleware = async (request) => {
+  const headers = getDefaultRequestHeaders(request)
+
+  const newUrl = new URL(
+    request.nextUrl.pathname.slice(0, -1),
+    getPublicNextURL(request)
+  )
+
+  return NextResponse.redirect(newUrl, {
+    headers,
+  })
+}
+
+export const matcher: MiddlewareMatcher = (request) => {
+  return request.nextUrl.pathname.endsWith("/")
+}