Winston not creating any output when running in a Docker container

import winston from 'winston'
import config from '../config'

const transports = []

transports.push(
  new winston.transports.Console(),
  new winston.transports.File({
    filename: 'test.log'
  })
)

const LoggerInstance = winston.createLogger({
  level: config.logs.level,
  levels: winston.config.npm.levels,
  format: winston.format.combine(
    winston.format.timestamp({
      format: 'YYYY-MM-DD HH:mm:ss'
    }),
    winston.format.errors({ stack: true }),
    winston.format.splat(),
    winston.format.json()
  ),
  transports
})

export default LoggerInstance

FROM node:current-alpine

WORKDIR /usr/src
RUN apk --no-cache add --virtual builds-deps build-base python
COPY package.json package.json
COPY package-lock.json package-lock.json
RUN npm install
COPY . .
ENV NODE_ENV production

CMD ["npm", "run", "start"]

import expressLoader from './express'
import databaseLoader from './database'
import dependencyLoader from './dependencies'
import modelLoader from './models'
import Logger from './logger'

export default async ({ expressApp }) => {
  const conn = databaseLoader
  Logger.info('✅️ Database loaded')

  try {
    await conn.authenticate()
    Logger.info(' ️Database connected')
  } catch (e) {
    Logger.error(' Error connecting to database: %o', e)
    process.exit(1)
  }

  Logger.info('➕ Injecting dependencies')
  dependencyLoader()
  Logger.info('✅️ Dependencies injected')

  Logger.info('➕ Injecting models')
  modelLoader()
  Logger.info('✅️ Models injected')

  expressLoader({ app: expressApp })
  Logger.info('✅️ Express loaded')
}