Misleading warnings/errors from quick start script

[jc-harrison]

The output from the quick start script can be misleading, suggesting problems when actually there are none.

Firstly, the synthetic data generation sometimes takes a little longer than 4 minutes, so the quick start script reports that flowdb failed to start when in fact there is no problem. We should increase the timeout sufficiently to avoid this.

Also, docker-compose warns that AUTOFLOW_DB_PASSWORD and FLOWAPI_TOKEN are not set. These are required for the autoflow container, but not for the containers started by the quick start script.

[greenape]

First is now fixed, for the second we can either: set the env vars to safe garbage ones, or (probably better) remove autoflow from the base compose file and put it in docker-compose.autoflow.yml.