Kjernekar is configured by environment variables:
HAIKUBOT_DB_PATH - relative path to db-file
HAIKUBOT_LOG_PATH - empty for console output
HAIKUBOT_SUPER_USER - admin user
REPOSITORY_URL - url pulling pull-requests
REPOSITORY_BASIC_AUTH - authentication token
REPOSITORY_POLL_INTERVAL - seconds between each poll from repo
SLACK_HAIKU_CHANNEL - channel-id to channel where haikus are automatically posted
SLACK_APP_TOKEN - app token to slack workspace
SLACK_BOT_TOKEN - bot token to slack workspace