doc: update badges for README.rst
Problem: Add Apache License Badge and Slack Chat Badge to README.md file
Solution: Badge link for Apache License Badge and Slack Chat added to README.md file
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Motr
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+.. Slack Badge - https://img.shields.io/badge/chat-on%20Slack-blu
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+.. image:: https://img.shields.io/badge/chat-on%20Slack-blue
+ :target: https://join.slack.com/t/cortxcommunity/shared_invite/zt-femhm3zm-yiCs5V9NBxh89a_709FFXQ?
+ :alt: Slack chat badge
+
+.. Codacy Badge - https://api.codacy.com/project/badge
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.. image:: https://api.codacy.com/project/badge/Grade/e047436e66e54d67b911294ad7fe8b4a
- :alt: Codacy Badge
:target: https://app.codacy.com/gh/Seagate/cortx-motr?utm_source=github.com&utm_medium=referral&utm_content=Seagate/cortx-motr&utm_campaign=Badge_Grade
+ :alt: Codacy Badge
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+.. License Badge - https://img.shields.io/badge/License-Apache%202.0-blue.svg
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+.. image:: https://img.shields.io/badge/License-Apache%202.0-blue.svg
+ :target: https://github.com/pujamudaliar/cortx-motr/blob/main/LICENCE
+ :alt: License Badge
+
Motr is a distributed object storage system, targeting `exascale <https://en.wikipedia.org/wiki/Exascale_computing>`_
configurations. Its main roots are Lustre file system, NFSv4 and database technology. It must be noted that traditional file system properties (hierarchical directory namespace, strong POSIX consistency guarantees, &c.) are no longer desirable or achievable at exascale. Instead, Motr is a more general storage system that provides an optional file system interface. This allows wider range of deployments, including cloud.
