switch to watchman

Dockerfile

@@ -14,7 +14,7 @@ ENV PYTHONUNBUFFERED 1
 #    python3 python3-dev gcc \
 #    gfortran musl-dev \
 #    libffi-dev openssl-dev
-RUN apt-get update && apt-get -y install postgresql postgresql-contrib git libcairo2-dev pkg-config gcc redis-tools
+RUN apt-get update && apt-get -y install postgresql postgresql-contrib git libcairo2-dev pkg-config gcc redis-tools watchman
 
 
 # install dependencies

requirements.txt

@@ -57,4 +57,5 @@ easy_thumbnails
 requests
 pygments
 celery[redis]
-redis
+redis
+pywatchman