fix docs image urls to be absolute path

docs/bucket/quota/README.md

@@ -1,6 +1,6 @@
 # Bucket Quota Configuration Quickstart Guide [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io) [![Docker Pulls](https://img.shields.io/docker/pulls/minio/minio.svg?maxAge=604800)](https://hub.docker.com/r/minio/minio/)
 
-![quota](bucketquota.png)
+![quota](https://raw.githubusercontent.com/minio/minio/master/docs/bucket/quota/bucketquota.png)
 
 Buckets can be configured to have one of two types of quota configuration - FIFO and Hard quota.
 

docs/bucket/versioning/README.md

@@ -10,25 +10,25 @@ Only MinIO generates version IDs, and they can't be edited. Version IDs are simp
 
 When you PUT an object in a versioning-enabled bucket, the noncurrent version is not overwritten. The following figure shows that when a new version of `spark.csv` is PUT into a bucket that already contains an object with the same name, the original object (ID = `ede336f2`) remains in the bucket, MinIO generates a new version (ID = `fae684da`), and adds the newer version to the bucket.
 
-![put](versioning_PUT_versionEnabled.png)
+![put](https://raw.githubusercontent.com/minio/minio/master/docs/bucket/versioning/versioning_PUT_versionEnabled.png)
 
 This means accidental overwrites or deletes of objects are protected, allows previous version of on object to be retrieved.
 
 When you DELETE an object, all versions remain in the bucket and MinIO adds a delete marker, as shown below:
 
-![delete](versioning_DELETE_versionEnabled.png)
+![delete](https://raw.githubusercontent.com/minio/minio/master/docs/bucket/versioning/versioning_DELETE_versionEnabled.png)
 
 Now the delete marker becomes the current version of the object. GET requests by default always retrieve the latest stored version. So performing a simple GET object request when the current version is a delete marker would return `404` `The specified key does not exist` as shown below:
 
-![get](versioning_GET_versionEnabled.png)
+![get](https://raw.githubusercontent.com/minio/minio/master/docs/bucket/versioning/versioning_GET_versionEnabled.png)
 
 GET requests by specifying a verison ID as shown below, you can retrieve the specific object version `fae684da`.
 
-![get_version_id](versioning_GET_versionEnabled_id.png)
+![get_version_id](https://raw.githubusercontent.com/minio/minio/master/docs/bucket/versioning/versioning_GET_versionEnabled_id.png)
 
 To permanently delete an object you need to specify the version you want to delete, only the user with appropriate permissions can permanently delete a version.  As shown below DELETE request called with a specific version id permenantly deletes an object from a bucket. Delete marker is not added for DELETE requests with version id.
 
-![delete_version_id](versioning_DELETE_versionEnabled_id.png)
+![delete_version_id](https://raw.githubusercontent.com/minio/minio/master/docs/bucket/versioning/versioning_DELETE_versionEnabled_id.png)
 
 ## Concepts
 - All Buckets on MinIO are always in one of the following states: unversioned (the default) and all other existing deployments, versioning-enabled, or versioning-suspended.

docs/metrics/prometheus/grafana/README.md

@@ -13,4 +13,4 @@ This document explains how to setup Grafana, to visualize MinIO metrics.
 
 To start visualizing MinIO metrics exposed by MinIO, you can use our Grafana dashboard. Import the dashboard by copying the `json` contents from the [file here](./Minio-Overview-1594305200170.json).
 
-![Grafana](grafana-minio.png)
+![Grafana](https://raw.githubusercontent.com/minio/minio/master/docs/metrics/prometheus/grafana/grafana-minio.png)