Merge branch 'packaging' into 'master'

add packaging following best practices

See merge request !30

README.md

@@ -15,7 +15,7 @@ in this package as the `LICENSE` file.
 You need at least Python 3.6 (latest version of 3.x recommended) to make use of this software.
 It simply will not run on older Python versions.
 
-Install the dependencies as you normally would (`pip3 install -r requirements.txt`).
+Download the project and install with pip (`pip3 install .`).
 
 Copy `relay.yaml.example` to `relay.yaml` and edit it as appropriate:
 

pyproject.toml

+[build-system]
+requires = ["setuptools","wheel"]
+build-backend = 'setuptools.build_meta'

requirements.txt

-aiohttp==3.3.2
-async-timeout==3.0.0
-attrs==18.1.0
-chardet==3.0.4
-idna==2.7
-idna-ssl==1.1.0
-multidict==4.3.1
-pycryptodome==3.9.4
-PyYAML>=5.1
-simplejson==3.16.0
-yarl==1.2.6
-cachetools
-async_lru

setup.cfg

+[metadata]
+name = relay
+description = Generic LitePub relay (works with all LitePub consumers and Mastodon)
+long_description = file: README.md
+long_description_content_type = text/markdown; charset=UTF-8
+url = https://git.pleroma.social/pleroma/relay
+license = AGPLv3
+license_file = LICENSE
+classifiers =
+    Environment :: Console
+    License :: OSI Approved :: AGPLv3 License
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+project_urls =
+    Source = https://git.pleroma.social/pleroma/relay
+    Tracker = https://git.pleroma.social/pleroma/relay/-/issues
+
+[options]
+zip_safe = False
+packages = find:
+install_requires =
+		aiohttp>=3.5.4
+		async-timeout>=3.0.0
+		attrs>=18.1.0
+		chardet>=3.0.4
+		idna>=2.7
+		idna-ssl>=1.1.0; python_version < "3.7"
+		multidict>=4.3.1
+		pycryptodome>=3.9.4
+		PyYAML>=5.1
+		simplejson>=3.16.0
+		yarl>=1.2.6
+		cachetools
+		async_lru
+python_requires = >=3.6

setup.py

+import setuptools
+
+if __name__ == "__main__":
+    setuptools.setup()