Chore: Use explicit database name in dev.docker-compose.yml

dev.docker-compose.yml

@@ -9,11 +9,12 @@ services:
     environment:
       - POSTGRES_USER=user
       - POSTGRES_PASSWORD=pass
+      - POSTGRES_DB=project-allocator
   project-allocator:
     image: project-allocator
     environment:
       - TEST_DATABASE_URL=postgresql://user:pass@test_db/test-db
-      - DB_OVERRIDE=postgresql://user:pass@main_db
+      - DB_OVERRIDE=postgresql://user:pass@main_db/project-allocator
     build:
       context: .
       dockerfile: dev.Dockerfile