The document discusses using Docker containers to enable a solar panel monitoring application to support multiple service providers. It describes setting up Docker containers for the TCP data ingestion server and Flask admin application for each provider, linking them to a Cassandra database container. Each provider's instances use a unique Cassandra keyspace to isolate their data. Automating this process using Docker Python APIs allows easily scaling to support additional providers. Lessons learned include Docker providing fast isolation without code changes, and needing improved Docker orchestration and Dockerfile support for multiple commands.