Fix issues with PYTHONPATH

.env

@@ -14,3 +14,7 @@ MULTIPROCESS_THREADS=2
 
 # We want to create the pipenv virtualenv in the current folder
 PIPENV_VENV_IN_PROJECT=1
+
+# Need to set pythonpath so that relative imports can be properly used in with pipenv
+# Refer to https://stackoverflow.com/q/52986500 and https://stackoverflow.com/a/49797761
+PYTHONPATH=${PWD}