Use an IoC container

ioc.diff

 function main () {
   return Promise.coroutine(function * () {
-    const logger = log4js.getLogger('main')
-
-    logger.info('Loading certificate...')
-    const JWT_CERTIFICATE_URL = requiredEnv('JWT_CERTIFICATE_URL')
-    const certificate = (yield axios.get(JWT_CERTIFICATE_URL)).data
-
-    logger.info('Connecting to MongoDB...')
-    const DEFAULT_MONGO_URL = 'mongodb://127.0.0.1:27017/bemuse'
-    const suppliedMongoUrl = process.env.MONGO_URL || process.env.MONGODB_URI
-    const db = yield connectMongo(suppliedMongoUrl || DEFAULT_MONGO_URL)
-    const factory = new MongoDBRepositoryFactory({ db })
+    const services = Object.assign({ }, ...[
+      configuration.logger.log4js,
+      configuration.config.env,
+      configuration.authentication.jwt,
+      configuration.database.mongodb,
+      configuration.repository.mongodb,
+      configuration.api
+    ])
+    const container = createIoCContainer(services)
     const port = +process.env.PORT || 8008
-
-    logger.info('Creating API...')
-    const app = createApiServer({
-      logger: log4js.getLogger('HTTP'),
-      legacyUserApiKey: requiredEnv('LEGACY_USER_API_KEY'),
-      legacyUserRepository: factory.createLegacyUserRepository(),
-      rankingEntryRepository: factory.createRankingEntryRepository(),
-      playerRepository: factory.createPlayerRepository(),
-      tokenValidator: createTokenValidator({ certificate })
-    })
-
-    logger.info('Let’s go!!!')
+    const app = yield container.get('api:app')
     runApiServer(app, port)
   })()
 }