Allow to configure uWSGI mount via environment variable (#926)

* Introduce UWSGI_MOUNT env var

* Add a note to the documentation.

Dockerfile

@@ -21,6 +21,7 @@ WORKDIR /webarchive
 ENV INIT_COLLECTION ''
 
 ENV VOLUME_DIR /webarchive
+ENV UWSGI_MOUNT '/=/pywb/pywb/apps/wayback.py'
 
 #USER archivist
 COPY docker-entrypoint.sh ./
@@ -31,4 +32,3 @@ EXPOSE 8080
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["uwsgi", "/uwsgi/uwsgi.ini"]
-

docs/manual/usage.rst

@@ -373,6 +373,8 @@ For example, to deploy pywb under the ``/wayback`` subdirectory, the ``uwsgi.ini
     mount = /wayback=./pywb/apps/wayback.py
     manage-script-name = true
 
+Alternatively this can also be achieved using the `UWSGI_MOUNT` environment variable, e.g. with the value `/wayback=/pywb/pywb/apps/wayback.py`.
+This is specifically handy on the docker image.
 
 .. _example-deploy:
 

uwsgi.ini

@@ -22,4 +22,13 @@ env = GEVENT_MONKEY_PATCH=1
 
 # specify config file here
 env = PYWB_CONFIG_FILE=config.yaml
+
+if-not-env = UWSGI_MOUNT
 wsgi = pywb.apps.wayback
+endif =
+
+# Set the path to which pywb should be mounted
+if-env = UWSGI_MOUNT
+mount = %(_)
+manage-script-name = true
+endif =