Aura to Embed a Flow in an External Website - code for your website

placeOnYourWebsite.html

<script src="https://YOUR-SALESFORCE-SITE-URL.com/lightning/lightning.out.js"></script>

<div id="lightningLocator"></div>

<script>
    $Lightning.use("c:embedFlowInExternalWebsiteApp",
        function() {
            $Lightning.createComponent(
                "c:embedFlowInExternalWebsite",
                { },                  
                "lightningLocator",   
                function(cmp) {}
            );
        },
        'https://YOUR-SALESFORCE-SITE-URL.com'
    );
</script>