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Update README about installation within Docker. #28

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Jan 16, 2023
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Update README about installation within Docker. #28

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8 changes: 8 additions & 0 deletions README.md
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Expand Up @@ -57,9 +57,17 @@ RUN fix-permissions $CONDA_DIR && \
# Set USER to the env variable jupyter uses for the default account
ENV USER=$NB_USER

RUN pip install jupyterlab_scheduler
RUN jupyter labextension install jupyterlab_scheduler

```

Note: You must manually start cron daemon, because it is not automatically started in Jupyter Docker images (Because, these imagas do not contain systemd.). Following command is an example to start cron from Docker's host:

```bash
docker exec -it -u root <container_id> service cron start
```

**Running into this error?**
```
ERROR: Service 'jupyter' failed to build: The command '/bin/bash -o pipefail -c jupyter labextension install jupyterlab_scheduler' returned a non-zero code: 1
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