HMD_MINIO_PORT must be converted to Number Type

[vazontang]

I found a bug when I was using Minio.
If a variable which is passed from environment will be String type .
But the port in Constructor of Minio client only accepts Number type .

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If Port is String type , there will be an error and cause image uploading failed.

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• As a result, please convert port of Minio into number type in /lib/config/environment.js .

 minio: {
    accessKey: process.env.HMD_MINIO_ACCESS_KEY,
    secretKey: process.env.HMD_MINIO_SECRET_KEY,
    endPoint: process.env.HMD_MINIO_ENDPOINT,
    secure: toBooleanConfig(process.env.HMD_MINIO_SECURE),
    port: parseInt(process.env.HMD_MINIO_PORT)
  },

[SISheogorath]

Nice you found this bug and the solution, would you like to file a PR for this?