Merge pull request #69 from UoMResearchIT/bugfix

Bugfix and small ammendments

episodes/dockerfiles.Rmd

@@ -415,6 +415,13 @@ Welcome to the Space Purple Unicorn Counter!
 
 The `EXPORT` variable is now set to `True` by default!
 
+::::: callout
+## ARG
+
+There is another instruction called `ARG` that is used to set variables in the `Dockerfile`.
+These variables are only available during the build process, and are not saved in the image.
+:::::::::::::
+
 :::::::::::: spoiler
 
 ## Layers - continued

learners/setup.md

@@ -62,10 +62,10 @@ However, if you have installed it using this service you will need to take the f
 `export TMPDIR=~/tmp`
 
 These commands will let you use docker in the current terminal instance,
-but you will have to run "export TEMPDIR=~/tmp" in every new terminal you want to use docker in.
+but you will have to run "export TMPDIR=~/tmp" in every new terminal you want to use docker in.
 
 An alternative is to append that command at the end of your bashrc file with the following command:  
-`echo "export TEMPDIR=~/tmp" >> ~/bashrc`
+`echo "export TMPDIR=~/tmp" >> ~/bashrc`
 
 This will configure each new instance of a terminal to run that command at the start of every new terminal instance.