Move peo package to a different spot to prepare it for PyPI

docker/peo-entrypoint.sh

@@ -40,8 +40,7 @@ EOF
 docker-entrypoint.sh "$@" &
 pg_pid=$!
 
-cd /opt/peo/bridge
-gosu postgres python3 -m peo &
+gosu postgres /opt/peo/venv/bin/peo &
 bridge_pid=$!
 
 pgadmin_pid=