feat: oidc based authentication

app/routes/oidc.callback.tsx

@@ -0,0 +1,15 @@
+import { type LoaderFunctionArgs } from '@remix-run/node'
+
+import { finishOidc } from '~/utils/oidc'
+
+export async function loader({ request }: LoaderFunctionArgs) {
+	const issuer = process.env.OIDC_ISSUER
+	const id = process.env.OIDC_CLIENT_ID
+	const secret = process.env.OIDC_CLIENT_SECRET
+
+	if (!issuer || !id || !secret) {
+		throw new Error('An invalid OIDC configuration was provided')
+	}
+
+	return finishOidc(issuer, id, secret, request)
+}