Migrate README from Markdown to reStructuredText

Pypi having hard time rendering unflavoured Markdown, so an easiest
way to fix this would be to migrate to reStructuredText

Signed-off-by: Aleksei Atavin <[email protected]>

README.rst

@@ -0,0 +1,83 @@
+.. image:: logo.png
+
+Rohmu is a Python library for building backup tools for databases
+providing functionality for compression, encryption and transferring
+data between the database and an object storage. Rohmu supports main
+public clouds such as GCP, AWS and Azure for backup storage. Rohmu is
+used in various backup tools such as
+`PGHhoard <https://github.com/aiven/pghoard>`__ for PostgreSQL,
+`MyHoard <https://github.com/aiven/myhoard>`__ for MySQL and
+`Astacus <https://github.com/aiven/astacus>`__ for M3 and ClickHouse and
+other databases.
+
+Features
+========
+
+-  Supported object storages: Azure, GCP, S3, Swift (OpenStack), local
+   file storage and SFTP.
+-  Supported compression algorithms: Snappy,
+   `zstd <https://github.com/facebook/zstd>`__ and
+   `lzma <https://docs.python.org/3/library/lzma.html>`__.
+
+Requirements
+============
+
+Rohmu requires Python >= 3.6+. For Python libary dependencies, have a
+look at
+`requirements.txt <https://github.com/aiven/rohmu/blob/main/requirements.txt>`__.
+
+Usage example
+=============
+
+*Add usage example here*
+
+For real-world usage you can have a look at `how Rohmu is used in
+PGHoard <https://github.com/aiven/pghoard/blob/main/pghoard/basebackup.py>`__.
+
+Development
+===========
+
+*TODO*
+
+License
+=======
+
+Rohmu is licensed under the Apache license, version 2.0. Full license
+text is available in the `LICENSE <LICENSE>`__ file.
+
+Please note that the project explicitly does not require a CLA
+(Contributor License Agreement) from its contributors.
+
+Trademarks
+==========
+
+PostgreSQL, MySQL, M3 and ClickHouse are trademarks and property of
+their respective owners. All product and service names used in this
+website are for identification purposes only and do not imply
+endorsement.
+
+Credits
+=======
+
+Rohmu was created by and is maintained by `Aiven
+<https://aiven.io>`__.
+
+Rohmu was originally a part of `PGHoard
+<https://github.com/aiven/pghoard>`__ but was later extracted to its
+own GitHub project.
+
+The Rohmu logo was created by `@evche-aiven
+<https://github.com/evche-aiven>`__.
+
+Contact
+=======
+
+Bug reports and patches are very welcome, please post them as GitHub
+issues and pull requests at https://github.com/aiven/rohmu . To report
+any possible vulnerabilities or other serious issues please see our
+`security <SECURITY.md>`__ policy.
+
+Copyright
+=========
+
+Copyright (C) 2022 Aiven Ltd and contributors to the Rohmu project.

rohmu.spec

@@ -38,7 +38,7 @@ python3 setup.py install --prefix=%{_prefix} --root=%{buildroot}
 
 %files
 %defattr(-,root,root,-)
-%doc README.md
+%doc README.rst
 %license LICENSE
 %{python3_sitelib}/*
 

setup.cfg

@@ -2,7 +2,7 @@
 name = rohmu
 version = attr: rohmu.version.VERSION
 description = "Rohmu is a python library providing an interface to various cloud storage providers."
-long_description = file: README.md
+long_description = file: README.rst
 license = Apache 2.0
 classifiers =
     Development Status :: 5 - Production/Stable