web.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <system.webServer>
        <rewrite>
            <rules>
                <rule name="Svelte routes" stopProcessing="true">
                    <match url=".*" />
                    <conditions logicalGrouping="MatchAll">
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                    </conditions>

                    <action type="Rewrite" url="/" />
                </rule>
            </rules>
        </rewrite>

        <staticContent>
            <mimeMap fileExtension=".json" mimeType="application/json" />
            <mimeMap fileExtension=".webmanifest" mimeType="application/manifest+json" />
        </staticContent>
    </system.webServer>
</configuration>