Extend README changes for minio

Author: SISheogorath

README.md

@@ -188,7 +188,7 @@ There are some configs you need to change in the files below
 | HMD_EMAIL | `true` or `false` | set to allow email signin |
 | HMD_ALLOW_PDF_EXPORT | `true` or `false` | Enable or disable PDF exports |
 | HMD_ALLOW_EMAIL_REGISTER | `true` or `false` | set to allow email register (only applied when email is set, default is `true`) |
-| HMD_IMAGE_UPLOAD_TYPE | `imgur`, `s3` or `filesystem` | Where to upload image. For S3, see our [S3 Image Upload Guide](docs/guides/s3-image-upload.md) |
+| HMD_IMAGE_UPLOAD_TYPE | `imgur`, `s3`, `minio` or `filesystem` | Where to upload image. For S3, see our Image Upload Guides for [S3](docs/guides/s3-image-upload.md) or [Minio](docs/guides/minio-image-upload.md) |
 | HMD_S3_ACCESS_KEY_ID | no example | AWS access key id |
 | HMD_S3_SECRET_ACCESS_KEY | no example | AWS secret key |
 | HMD_S3_REGION | `ap-northeast-1` | AWS S3 region |
@@ -246,7 +246,7 @@ There are some configs you need to change in the files below
 | documentmaxlength | `100000` | note max length |
 | email | `true` or `false` | set to allow email signin |
 | allowemailregister  | `true` or `false` | set to allow email register (only applied when email is set, default is `true`) |
-| imageUploadType | `imgur`(default), `s3` or `filesystem` | Where to upload image
+| imageUploadType | `imgur`(default), `s3`, `minio` or `filesystem` | Where to upload image
 | minio | `{ "accessKey": "YOUR_MINIO_ACCESS_KEY", "secretKey": "YOUR_MINIO_SECRET_KEY", "endpoint": "YOUR_MINIO_HOST", port: 9000, secure: true }` | When `imageUploadType` is set to `minio`, you need to set this key. Also checkout our [Minio Image Upload Guide](docs/guides/minio-image-upload.md) |
 | s3 | `{ "accessKeyId": "YOUR_S3_ACCESS_KEY_ID", "secretAccessKey": "YOUR_S3_ACCESS_KEY", "region": "YOUR_S3_REGION" }` | When `imageUploadType` be set to `s3`, you would also need to setup this key, check our [S3 Image Upload Guide](docs/guides/s3-image-upload.md) |
 | s3bucket | `YOUR_S3_BUCKET_NAME` | bucket name when `imageUploadType` is set to `s3` or `minio` |
@@ -256,7 +256,7 @@ There are some configs you need to change in the files below
 | service | settings location | description |
 | ------- | --------- | ----------- |
 | facebook, twitter, github, gitlab, mattermost, dropbox, google, ldap, saml | environment variables or `config.json` | for signin |
-| imgur, s3 | environment variables or `config.json` | for image upload |
+| imgur, s3, minio | environment variables or `config.json` | for image upload |
 | google drive(`google/apiKey`, `google/clientID`), dropbox(`dropbox/appKey`) | `config.json` | for export and import |
 
 ## Third-party integration oauth callback urls