medusa-file-minio (#883)

* A first commit for medusa-file-minio

* Cleanup and remove unnecessary env vars

* Update packages

* Small fix big letter

packages/medusa-file-minio/README.md

@@ -0,0 +1,14 @@
+# medusa-file-minio
+
+Upload files to a MinIO server.
+
+## Options
+
+```
+  endpoint: [endpoint of your MinIO server],
+  bucket: [name of your bucket],
+  access_key_id: [access-key],
+  secret_access_key: [secret-access-key],
+```
+
+Follow [this guide](https://docs.medusa-commerce.com/how-to/uploading-images-to-minio) to configure the plugin.