For small projects, I usually instantiate every service (Dependencies) in one file, and when everything is up and running, we can start the server, and we can access everything. Like in this example (a python API from a high voltage wire designer app):
# Dependencies
wind_effect_calculator = WindEffectCalculator()
wind_pressure_calculator = WindPressureCalculator()
wire_density_calculator = WireDensityCalculator(CriticalStanchionDistanceCalculator())
wire_tension_calculator = WireTensionCalculator()