Fix Multi version docs, closes #1739

docs/build_docs.sh

@@ -1,6 +1,6 @@
 #!/bin/bash -eux
 # Building sphinx and swagger docs
-poetry run python -m sphinx . $BUILD_PATH # TODO enable multi version #1739
+poetry run sphinx-multiversion . $BUILD_PATH
 TARGET_PATH="$BUILD_PATH/swagger" ./build_swagger.sh
 python ./get-releases-json.py > $BUILD_PATH/releases.json
 python ./get-releases-json.py --latest > $BUILD_PATH/latest.txt

docs/conf.py

@@ -82,9 +82,8 @@ author = "The Funkwhale Collective"
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
-#
-# The short X.Y version.
-version = subprocess.check_output(["git", "describe", "--tags"]).strip().decode("utf-8")
+# Read version from the API
+version = funkwhale_api.__version__
 release = version
 
 # The language for content autogenerated by Sphinx. Refer to documentation