Warn about using regular docker run

README.md

@@ -140,7 +140,7 @@ docker-compose build
 docker build -t pleroma .
 ```
 
-I prefer the latter because it's more verbose.
+I prefer the latter because it's more verbose but this will ignore any build-time variables you have set in `docker-compose.yml`.
 
 Setup the database:
 

docker-compose.yml

@@ -23,9 +23,9 @@ services:
       # Feel free to remove or override this section
       # See 'Build-time variables' in README.md
       args:
-        - "UID=911"
-        - "GID=911"
-        - "PLEROMA_VER=develop"
+        - "UID=1000"
+        - "GID=1000"
+        - "PLEROMA_VER=v2.4.2"
     volumes:
       - ./uploads:/var/lib/pleroma/uploads
       - ./static:/var/lib/pleroma/static