diff --git a/.env.sample b/.env.sample
index 00fb98228..eb38082ad 100644
--- a/.env.sample
+++ b/.env.sample
@@ -27,7 +27,9 @@ VITE_SUPABASE_URL=http://localhost:54321
 VITE_SUPABASE_ANON_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6ImFub24iLCJleHAiOjE5ODM4MTI5OTZ9.CRXP1A7WOeoJeXxjNni43kdQwgnWNReilDMblYTn_I0
 
 # Other
+# The port is only used for local development / tests
 VITE_PORT=5173
+# the port is only used for local development / tests. In production, use the absolute URL without port.
 VITE_BASE_URL=http://localhost:${VITE_PORT}
 VITE_RECOVERY_AUTH_REDIRECT_URL=${VITE_BASE_URL}/profile/reset-password
 TEST_SUPABASE_INBUCKET_URL=http://localhost:54324