use deploy dev option

netlify.toml

@@ -1,21 +1,22 @@
 # example netlify.toml
 [build]
-  command = "yarn dev"
+  command = "next build"
   functions = "netlify/functions"
   publish = ".next"
 
-  ## Uncomment to use this redirect for Single Page Applications like create-react-app.
-  ## Not needed for static site generators.
-  #[[redirects]]
-  #  from = "/*"
-  #  to = "/index.html"
-  #  status = 200
+## Uncomment to use this redirect for Single Page Applications like create-react-app.
+## Not needed for static site generators.
+#[[redirects]]
+#  from = "/*"
+#  to = "/index.html"
+#  status = 200
 
-  ## (optional) Settings for Netlify Dev
-  ## https://github.com/netlify/cli/blob/main/docs/netlify-dev.md#project-detection
-  #[dev]
-  #  command = "yarn start" # Command to start your dev server
-  #  port = 3000 # Port that the dev server will be listening on
-  #  publish = "dist" # Folder with the static content for _redirect file
+## (optional) Settings for Netlify Dev
+## https://github.com/netlify/cli/blob/main/docs/netlify-dev.md#project-detection
+[dev]
+command = "yarn start" # Command to start your dev server
+port = 3000 # Port that the dev server will be listening on
+#  publish = "dist" # Folder with the static content for _redirect file
+publish = ".next"
 
-  ## more info on configuring this file: https://docs.netlify.com/configure-builds/file-based-configuration/
+## more info on configuring this file: https://docs.netlify.com/configure-builds/file-based-configuration/