refactor: use source dir to get app path in config

Author: james-elicx

packages/cloudflare/src/cli/config.ts

@@ -49,8 +49,9 @@ export type Config = {
  * @returns The configuration, see `Config`
  */
 export function getConfig(projectOpts: ProjectOptions): Config {
+  const sourceDirDotNext = join(projectOpts.sourceDir, ".next");
   const dotNext = join(projectOpts.outputDir, ".next");
-  const appPath = getNextjsApplicationPath(dotNext).replace(/\/$/, "");
+  const appPath = getNextjsApplicationPath(sourceDirDotNext).replace(/\/$/, "");
   const standaloneRoot = join(dotNext, "standalone");
   const standaloneApp = join(standaloneRoot, appPath);
   const standaloneAppDotNext = join(standaloneApp, ".next");