fix: bump default BUILD_VERSION in docker-compose.yml to 0.2.0.2

The tagged release was building as 0.2.0 because docker-compose.yml defaulted
to the old version. New installs and rebuilds now pick up the correct version
from the file.

docker-compose.yml

@@ -21,7 +21,7 @@ services:
       context: .
       dockerfile: ./server/Dockerfile
       args:
-        BUILD_VERSION: ${BUILD_VERSION:-0.2.0}
+        BUILD_VERSION: ${BUILD_VERSION:-0.2.0.2}
     container_name: redflag-server
     volumes:
       - server-config:/app/config