fixes for hosted cellxgene (#1227)

* Fix for favicon with --dataroot

* fix static assets in hosted cxg 

The web proxy at aws eb was not finding the static assets.

The solution here is very simple: just copy the directory
containing the static assets to the top level of the artifact.zip.

This is not really the ideal solution.  According to the AWS
docs you can make a mapping to the correct location in an
an ebextentions config file.  I tried this and many combinations but
was not able to get this to work following that pattern.

Since we control the construction of the zip file, the solution
here isn't bad, but it could probably be made better.

server/eb/.ebextensions/wsgi_app_group_global.config

@@ -1,4 +1,4 @@
-# Configue WSGI so that it will work with numpy, scanpy, etc, which all use the
+# Configure WSGI so that it will work with numpy, scanpy, etc, which all use the
 # Python SWIG, and therefore will deadlock on start.  For more information, see
 # https://modwsgi.readthedocs.io/en/develop/user-guides/application-issues.html#python-simplified-gil-state-api
 files:

server/eb/Makefile

@@ -20,7 +20,9 @@ build: clean
 	cp app.py artifact.dir/application.py; \
 	cp ../requirements.txt artifact.dir; \
 	cp -r .ebextensions artifact.dir; \
-	(cd artifact.dir; zip -r ../artifact.zip . --exclude server/test/\* server/eb/\* ); \
+	(cd artifact.dir; \
+	  cp -r server/common/web/static static; \
+	  zip -r ../artifact.zip . --exclude server/test/\* server/eb/\* ; ); \
 	if ! grep artifact.zip .elasticbeanstalk/config.yml ; then \
 	    mkdir -p .elasticbeanstalk ; cat config_deploy.yaml >> .elasticbeanstalk/config.yml ; fi
 

server/eb/README.md

@@ -70,5 +70,5 @@ There are many more options to these commands that may be important or necessary
 7. Open the application in a browser
 
    ```
-   eb open
+   eb open $EB_ENV
    ```