Add start/stop server reference pages

Author: mfisher87

assets/images/cryocloud-hub-control-panel.png

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+# 🚀 Starting your server
+
+Everything in this workshop will be done on your own personal server on
+[the CryoCloud JupyterHub](https://hub.cryointhecloud.com/).
+
+**Your server's disk space is persistent, meaning that any files you create will still
+exist after you stop and restart your server.**
+
+
+## Server options
+
+Once you're logged in to [the CryoCloud JupyterHub](https://hub.cryointhecloud.com),
+you'll be presented with a screen like this:
+
+![](../assets/images/cryocloud-server-options.png)
+
+Select:
+
+* **Environment**: "Other..."
+* **Custom image**: `ghcr.io/geojupyter/workshop-open-source-geospatial:latest`
+    * TODO: Update `latest` to a fixed tag
+* **Resource allocation**: "~4GB RAM, ~0.5 CPUs"
+
+:::{important}
+It's critical to only allocate the resources you need so that CryoCloud can sustain its
+operations!
+
+If you find your analysis requires more resources than you allocated, you can
+[stop your server](./02-stopping-your-server.md) and recreate it with more resources.
+
+It's also important to [stop your server](./02-stopping-your-server.md) when you're not
+using it.
+:::
+
+
+## Click "Start"
+
+When you click start, CryoCloud will begin creating your personal server.
+You should see a progress bar like this:
+
+![](../assets/images/cryocloud-server-starting.png)
+
+After a few moments, you'll be presented with the JupyterLab interface.

assets/images/cryocloud-server-options.png

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+# 🛑 Stopping your server
+
+**It's important to stop your server when you're not using it.**
+This way CryoCloud can keep its cost down and remain available for you to use for free
+in the future!
+
+
+## Hub Control Panel
+
+Your "Hub Control Panel" allows you to manage your server.
+
+To access the control panel, click **File**, then **Hub Control Panel**.
+
+![](../assets/images/cryocloud-hub-control-panel.png)
+
+Click **Stop My Server**, and wait a few seconds.
+Once your server is stopped, the **Stop My Server** button will disappear.