public static Injector bootstrapApplication(final Config configuration,
                                                final Environment environment,
                                                final Path configFile) {
        return bootstrapApplication(
                configuration,
                () -> new BootStrapModule(configuration, environment, configFile));
    }
Creates an injector with the bare minimum to initialise the DB connections and configuration.
The initialisation of the DB datasources will trigger the FlyWay DB migration to run.
You should call {@link Injector#createChildInjector} to build a fully formed injector from it.
stroom-app/src/main/java/stroom/app/BootstrapUtil.java