Add PAYLOAD_SERVER_URL to environment variables

docker-compose.yml

@@ -15,10 +15,10 @@ services:
     build:
       context: payload
     environment:
+      PAYLOAD_SERVER_URL: ${PAYLOAD_SERVER_URL}
       PAYLOAD_PORT: ${PAYLOAD_PORT}
       PAYLOAD_SECRET: ${PAYLOAD_SECRET}
       MONGODB_URI: ${MONGODB_URI}
-      PAYLOAD_SERVER_URL: ${PAYLOAD_SERVER_URL}
       TOKEN: ${TOKEN}
     networks:
       - front