douban happyday docker for daeqaci

Docker in daeqaci provides the following benefits for testing: 1. Testing environments match production environments more closely by running tests inside Docker containers with the same base software environments. 2. Tests are isolated from each other and can be reproduced independently on different machines by defining the full testing environment through Docker Compose files. 3. Test initialization data is cached and reused through Docker images, speeding up test execution significantly compared to traditional testing.