fix site package error

resolves #3

Author: peterdavidfagan

python3/setup.sh

@@ -1,4 +1,4 @@
 python3 -m venv venv
 source venv/bin/activate
 pip3 install --require-hashes -r requirements.txt
-echo "../../../../src" > $(python3 -c 'import site; print(site.getsitepackages()[0])')/pushworld.pth
+echo $(python3 -c 'import os; print(os.getcwd())')/src > $(python3 -c 'import site; print(site.getsitepackages()[0])')/pushworld.pth