Expand missing next.config error message

[shashankboosi]

Fixes #82

Found out that next dev can run the a Next.js app without next.config but if we are using the adapter we throw an error if we don't find the config

1. So added a detailed error to point towards adding the next.config to run the application.
2. Updated wrangler to it's latest version
3. Also added the vercel blog starter into the examples which is what I used to debug the issue mentioned

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Latest commit: f045531

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commit: f045531

[vicb]

Looks like the PR contains quite a fex unwanted changes!

Could you please also add a patch changeset (see the automated comment on the PR).

Thanks a lot

[vicb]

OOps, I should have read the PR description.

Would you mind splitting 1, 2, and 3 into different PRs?

Thanks!

[shashankboosi]

@vicb Will create different PRs, should I add patch changeset for all the PRs?

[vicb]

Thanks!

should I add patch changeset for all the PRs?

I would say only the error message fix.
It's not the biggest change but it will be very valuable to users.

[shashankboosi]

I will close this and open separate PRs. Thanks!