fix mongodb hostname

Author: fitztrev

compose-lila-ws-image.yml

@@ -7,7 +7,7 @@ services:
       - CONFIG_FORCE_kamon.enabled=${ENABLE_MONITORING:-false}
       - CONFIG_FORCE_influxdb.hostname=influxdb
       - CONFIG_FORCE_influxdb.authentication.token=secret
-      - CONFIG_FORCE_mongo_uri=mongodb://mongo:27017/lichess?appName=lila-ws
+      - CONFIG_FORCE_mongo_uri=mongodb://mongodb:27017/lichess?appName=lila-ws
       - CONFIG_FORCE_redis.uri=redis://redis
     profiles:
       - base