Moved last set of Tutorials

docs/source/tutorial/getting-started/spawners-basics.md

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+(spawners)=
+
+# Spawners and single-user notebook servers
+
+A Spawner starts each single-user notebook server. Since the single-user server is an instance of `jupyter notebook`, an entire separate
+multi-process application, many aspects of that server can be configured and there are a lot
+of ways to express that configuration.
+
+At the JupyterHub level, you can set some values on the Spawner. The simplest of these is
+`Spawner.notebook_dir`, which lets you set the root directory for a user's server. This root
+notebook directory is the highest-level directory users will be able to access in the notebook
+dashboard. In this example, the root notebook directory is set to `~/notebooks`, where `~` is
+expanded to the user's home directory.
+
+```python
+c.Spawner.notebook_dir = '~/notebooks'
+```
+
+You can also specify extra command line arguments to the notebook server with:
+
+```python
+c.Spawner.args = ['--debug', '--profile=PHYS131']
+```
+
+This could be used to set the user's default page for the single-user server:
+
+```python
+c.Spawner.args = ['--NotebookApp.default_url=/notebooks/Welcome.ipynb']
+```
+
+Since the single-user server extends the notebook server application,
+it still loads configuration from the `jupyter_notebook_config.py` config file.
+Each user may have one of these files in `$HOME/.jupyter/`.
+Jupyter also supports loading system-wide config files from `/etc/jupyter/`,
+which is the place to put configuration that you want to affect all of your users.