add env variables for convex

packages/backend/env.example

@@ -3,3 +3,15 @@ CONVEX_SELF_HOSTED_URL=
 CONVEX_SELF_HOSTED_ADMIN_KEY=
 SETUP_SCRIPT_RAN=
 CONVEX_URL=
+SITE_URL=
+AUTH_URL=
+CONVEX_SITE_URL=
+# Authentik Environment Variables
+AUTH_AUTHENTIK_ID=
+AUTH_AUTHENTIK_SECRET=
+AUTH_AUTHENTIK_ISSUER=
+# Microsoft Entra ID
+AUTH_MICROSOFT_ENTRA_ID_ID=
+AUTH_MICROSOFT_ENTRA_ID_SECRET=
+AUTH_MICROSOFT_ENTRA_ID_ISSUER=
+AUTH_MICROSOFT_ENTRA_ID_AUTH_URL=