Temporarily use custom authlib dependency

docker/Dockerfile

@@ -1,5 +1,8 @@
 FROM python:3-alpine
 
+# Until https://github.com/lepture/authlib/pull/261 is merged
+RUN apk add git
+
 RUN adduser -D -h /app oauthserver
 COPY --chown=oauthserver:oauthserver . /app/
 RUN apk add curl libldap libffi su-exec

setup.cfg

@@ -18,7 +18,8 @@ packages = find:
 include_package_data = true
 python_requires = >= 3.6
 install_requires =
-    authlib
+    # Until https://github.com/lepture/authlib/pull/261 is merged
+    authlib @ git+https://github.com/azmeuk/authlib.git@rfc8414-is-secure-transport
     flask
     flask-babel
     flask-wtf