Update project settings

Author: Jacek Gębal

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
 
     services:
       oracle:
-        image: ${{env.ORACLE_DOCKER_IMAGE}}
+        image: gvenzl/oracle-free:23-slim-faststart
         env:
           ORACLE_PASSWORD: oracle
           SERVICE_NAME: FREEPDB1