Your configuration means that Nginx is listening on port 80 and will
forward any request form example.com to a backend located on localhost
listening on port 8009.

Since Nginx is a proxy, you need a backend to serve content to which
requests sent to Nginx will be forwarded.

You seem not to understand what you are doing...
You machine is doing precisely what you ask it to do. Not more, not less.
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*B. R.*
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