Add required property to depends_on

Author: nickjj

CHANGELOG.md

@@ -9,6 +9,8 @@ Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Changed
 
+- Add `required: false` to `depends_on` in `docker-compose.yml` (requires Docker Compose v2.20.2+)
+
 #### Back-end dependencies
 
 - Update `cssbundling-rails` to `1.2.0`

README.md

@@ -102,8 +102,10 @@ README.
 You'll also need to enable Docker Compose v2 support if you're using Docker
 Desktop. On native Linux without Docker Desktop you can [install it as a plugin
 to Docker](https://docs.docker.com/compose/install/linux/). It's been generally
-available for a while now and very stable. This project uses a specific Docker
-Compose profiles feature that only works with Docker Compose v2.
+available for a while now and is stable. This project uses specific [Docker
+Compose v2
+features](https://nickjanetakis.com/blog/optional-depends-on-with-docker-compose-v2-20-2)
+that only work with Docker Compose v2 2.20.2+.
 
 If you're using Windows, it will be expected that you're following along inside
 of [WSL or WSL

docker-compose.yml

@@ -8,8 +8,12 @@ x-app: &default-app
       - "RAILS_ENV=${RAILS_ENV:-production}"
       - "NODE_ENV=${NODE_ENV:-production}"
   depends_on:
-    - "postgres"
-    - "redis"
+    postgres:
+      condition: "service_started"
+      required: false
+    redis:
+      condition: "service_started"
+      required: false
   env_file:
     - ".env"
   restart: "${DOCKER_RESTART_POLICY:-unless-stopped}"