Fix calibre-web.subdomain.conf.sample to work with Kobo

[Snuupy]

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• I have read the contributing guideline and understand that I have made the correct modifications

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Description

Current reverse proxy config doesn't work for kobo

I don't necessarily expect this PR to get merged cus I actually think it's ugly that the proxy_set_header stuff is all repeated but it is what it is (current default borks for kobo, this one doesn't)

please feel free to refactor as necessary so it's not dirty

Benefits of this PR and context

kobo sync works now instead of fail/error, downloads work too

How Has This Been Tested?

I have a kobo and this works, original conf doesn't sync NOR download

Source / References

janeczku/calibre-web#1891 (comment)

[jgillman]

IDK how to make a commit to your PR so I'll leave it as a comment instead 😅

If you remove the changes in the location / block you can simplify them and move them to a new block that will only affect the /kobo/ endpoint.

At the end of the server block you'd then add:

    location /kobo/ {
        include /config/nginx/proxy.conf;
        include /config/nginx/resolver.conf;
        set $upstream_app calibre-web;
        set $upstream_port 8083;
        set $upstream_proto http;
        proxy_pass $upstream_proto://$upstream_app:$upstream_port;
        proxy_set_header X-Scheme $scheme;
        proxy_buffer_size 128k;
        proxy_buffers 4 256k;
        proxy_busy_buffers_size 256k;
    }

[jgillman]

Oh and you can also add the same changes to the calibre-web.subdomain.conf.sample version for completion :)