diff --git a/docker-compose.yml b/docker-compose.yml
index b6dbbd459..aeb7d4f4d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,18 +1,22 @@
-# This file is for testing only, as I don't recommend using Docker Compose in a production environment
+## This file is for testing only, as I don't recommend using Docker Compose
+## in a production environment
 version: "3.7"
 
 services:
   db:
     image: postgres:14-alpine
-    # image: groonga/pgroonga:3.1.1-alpine-14 # Use this one if you want to use PGroonga
+    ## Use the following image instead if you want to use PGroonga
+    # image: groonga/pgroonga:3.1.1-alpine-14
     restart: unless-stopped
     environment:
       POSTGRES_DB: akkoma
       POSTGRES_USER: akkoma
       POSTGRES_PASSWORD: akkoma
-    # Comment out the volume below if you encounter any permission errors
     volumes:
       - ./docker-db/:/var/lib/postgresql/data/:Z
+      ## Use the following volume instead if you are running Docker in
+      ## emulated environments and getting permission errors
+      # - docker-db:/var/lib/postgresql/data/:Z
 
   akkoma:
     image: akkoma:latest