Minor tweaks for development setup

backend/dev-docker/Dockerfile

@@ -3,8 +3,8 @@ FROM python:3.8-slim
 # https://stackoverflow.com/questions/58701233/docker-logs-erroneously-appears-empty-until-container-stops
 ENV PYTHONUNBUFFERED=1
 
-COPY requirements.txt /tmp/requirements.txt
-RUN pip3 install -r /tmp/requirements.txt
+# Should be mounted from docker-compose-development.yml
+RUN pip3 install -r /requirements.txt
 
 
 RUN [ ! -d "/datastore" ] && mkdir /datastore

backend/dev-docker/requirements.txt

@@ -1,20 +0,0 @@
-aiohttp
-async-timeout
-chardet==2.3.0
-multidict
-python-engineio
-six==1.10.0
-yarl
-flask
-
-eventlet
-requests
-validators
-
-bleach==3.2.1
-html5lib==0.9999999       # via bleach
-timeago
-html2text
-
-# @notes
-# - Dont install socketio, it interferes with flask_socketio