1) Launch Oracle XE

Start the Oracle XE container:

docker run -d --name oracle-xe \
  -p 1521:1521 \
  -e ORACLE_PASSWORD=SystemPass123 \
  container-registry.oracle.com/database/express:latest

The first run downloads the image (~4 GB) and initializes the database, which can take a few minutes. Check the logs to monitor progress:

docker logs -f oracle-xe

Wait until you see DATABASE IS READY TO USE! before proceeding.