Add startup script that runs the server on hopefully safe port
Add startup script that runs the server on hopefully safe port

bitzesty/trade-tariff-backend,bitzesty/trade-tariff-backend,leftees/trade-tariff-backend,bitzesty/trade-tariff-backend,leftees/trade-tariff-backend,alphagov/trade-tariff-backend,alphagov/trade-tariff-backend,leftees/trade-tariff-backend,alphagov/trade-tariff-backend