Form action changes protocol from http to https

[Stadly]

I'm using Auth.js with SvelteKit. In my development environment, everything works as it should. I have a Dockerfile for setting up the production environment. When the production environment is deployed it works as it should. But when testing the production environment locally, it does not work.

When I run the production environment locally, it is available under http://localhost:3000. The issue is that when I go to http://localhost:3000/auth/signin, the form looks like this: <form action="https://localhost:3000/auth/signin/azure-ad" method="POST">. As you can see, http has been changed to https. This results in a ERR_SSL_PROTOCOL_ERROR. How can I prevent this from happening?

When running the development environment without using the Dockerfile (npm run dev), the form action retains the http protocol, so it works as it should.

[c1969]

Hey @Stadly,
same Prob here... did get any results/solution on that meanewhile?

[Stadly]

No, have not been able to solve it.

[vortura]

I was stuck on this too. What worked for me was setting the ORIGIN environment variable to http://localhost:3000. E.g.

ORIGIN=http://localhost:3000 node build

See https://kit.svelte.dev/docs/adapter-node#environment-variables-origin-protocolheader-hostheader-and-port-header for details.