Remove .env.local from env_file (#1113)

Arrays for env_file are only supported in Docker Compose >=v2.24 which is too new (from January 2024). Most distros distribute older packages.

Since --env-file as defined in the sndev script acts as an override for env_file anyway, we can safely remove it here.

Co-authored-by: ekzyis <ekzyis@ekzy.is>

docker-compose.yml

@@ -1,7 +1,4 @@
-x-env_file: &env_file
-  - .env.development
-  - path: .env.local
-    required: false
+x-env_file: &env_file .env.development
 x-healthcheck: &healthcheck
   interval: 10s
   timeout: 10s