Merge pull request #28 from czi-catalystproject/episode-4-exercises

Add Episode 4 exercises after review

_config.yml

@@ -53,6 +53,7 @@ parse:
     - replacements
     - smartquotes
     - substitution
+    - tasklist
 
 sphinx:
   extra_extensions:

episodes/transfer_data.md

@@ -29,13 +29,71 @@ Objectives
 
 ## Exercises
 
-::::{dropdown} Challenge Title
+::::{dropdown} What should you store in your home directory?
 :open:
 
-Challenge content
+Select all that apply:
+
+- [ ] Notebooks
+- [ ] Code
+- [ ] Large and/or shared datasets with read-write permissions
+- [ ] Text files
+- [ ] Small datasets
+- [ ] Configuration files
+- [ ] Read-only datasets, e.g for teaching
+- [ ] Temporary data, e.g. intermediate results from a calculation
+
+:::{dropdown} Solution
+
+- [x] Notebooks
+- [x] Code
+- [ ] Large and/or shared datasets with read-write permissions – *consider using Cloud Object Storage or other cloud-native storage solutions*
+- [x] Text files
+- [x] Small datasets
+- [x] Configuration files
+- [ ] Read-only datasets, e.g for teaching – *consider placing these files in the `~/shared` directory*
+- [ ] Temporary data, e.g. intermediate results from a calculation – *consider using the `/tmp` directory*
+
+:::
+
+::::
+
+:::{dropdown} Data requirements
+:open:
+
+Think about the data that you or your community require for your/their work.
+
+- What type of data is it? E.g. tabular data (.csv, .xls), images (.png, .jpg, .bmp), other scientific data formats (.h5, .nc, .fastq)
+- How large is a typical dataset?
+- Where is the data stored?
+- Is the same dataset used by a group of collaborators?
+
+Write up your thoughts in our shared collaborative document.
+
+:::
+
+::::{dropdown} Push GitHub code
+:open:
+
+You use the Git JupyterLab extension to push code to a remote repository on GitHub and the following box opens:
+
+:::{image} ../media/episodes/transfer_data/gh-credentials.png
+:alt: Information box asking for GitHub credentials such as username and Personal Access Token.
+:width: 80%
+:align: center
+
+:::  
+
+<br>
+
+What should you do?
+
+1. Enter your GitHub username and Personal Access Token as requested, then click *Save my login temporarily*
+1. Click *Cancel*, open a Terminal, enter the command `gh-scoped-creds` and follow the prompt
 
 :::{dropdown} Solution
-Solution content
+
+The correct answer is 2 – never enter your GitHub credentials (GitHub password, personal access tokens or otherwise) on any kind of shared infrastructure (e.g. private and public cloud, HPC, any remote machine) as this information will be at risk.
 
 :::