Feat/api docker

Created by: Jenselme

• chore(config): remove deprecated test section

• chore(config): load configuration for docker by default

  By default in dev, we rely on config/config.docker.toml. If config/config.dev.toml exist, we load this instead.

• feat(scripts): log loaded configuration file

• doc(README): correct type

• doc(README): update now that the API is run within docker by default