Update Dockerfile

Dockerfile

@@ -3,7 +3,7 @@ RUN conda install -c psi4/label/dev -c conda-forge psi4 dftd3 mp2d qcengine qcfr
 ADD manager.yml /etc/qcfractal-manager/manager.yaml
 RUN groupadd -g 999 qcfractal && \
     useradd -m -r -u 1000 -g qcfractal qcfractal
-RUN apt-get update && apt-get install -y iputils-ping
+# RUN apt-get update && apt-get install -y iputils-ping
 # RUN timeout -i 2 ping 34.28.232.61
 ENV PATH /opt/local/conda/envs/base/bin/:$PATH
 ENTRYPOINT qcfractal-manager --config-file /etc/qcfractal-manager/manager.yaml