Update Dockerfile

Click breaks workers 
Issue: rq/rq#1469

Author: vhiwase

project/dashboard/Dockerfile

@@ -1,6 +1,7 @@
 FROM python:3.9.1-alpine
 
-RUN pip install rq-dashboard
+RUN pip install rq-dashboard==0.6.1
+RUN pip install click==7.1.2
 
 EXPOSE 9181