Custom Docker Images can be created based on the official Airlock IAM image. See https://docs.docker.com/engine/reference/builder/.
Dockerfile
FROM docker.io/ergon/airlock-iam:7.7# Uncomment if you need to initialize a default config root directory
#RUN /opt/airlock-iam/bin/iam init
# Copy a prepared config root directory
COPY --chown=1000:0 ./config/ /home/airlock/iam/
ENV TZ="Europe/Zurich"
CMD ["run", "--profile", "integration"]