1. Create File "Dockerfile" in same directory as "docker-compose.yaml"
2. Write 
FROM apache/airflow:2.0.2
RUN pip install --no-cache-dir geopandas another-package
3. Build new image:
docker build . --tag projectname-airflow:2.0.2
4. In "docker-compose.yaml" replace
image: ${AIRFLOW_IMAGE_NAME:-apache/airflow:2.0.2}
with 
image: ${AIRFLOW_IMAGE_NAME:-projectname-airflow:2.0.2}
5. In Shell move to directory an run
docker build . --tag projectname-airflow:2.0.2
6. Epic win