diff --git a/README.md b/README.md
index 9432720..8f6e11a 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://tinyletter.com/jbranchaud).
 
-_1109 TILs and counting..._
+_1110 TILs and counting..._
 
 ---
 
@@ -323,6 +323,10 @@ _1109 TILs and counting..._
 - [Sleep For A Duration](go/sleep-for-a-duration.md)
 - [Upgrading From An Older Version On Mac](go/upgrading-from-an-older-version-on-mac.md)
 
+### Heroku
+
+- [Set And Show Heroku Env Variables](heroku/set-and-show-heroku-env-variables.md)
+
 ### HTML
 
 - [Adding Alt Text To An Image](html/adding-alt-text-to-an-image.md)
diff --git a/heroku/set-and-show-heroku-env-variables.md b/heroku/set-and-show-heroku-env-variables.md
new file mode 100644
index 0000000..16d0d77
--- /dev/null
+++ b/heroku/set-and-show-heroku-env-variables.md
@@ -0,0 +1,30 @@
+# Set And Show Heroku Env Variables
+
+The `heroku` CLI includes the `config` command which will show all the env
+variables for the current app.
+
+```bash
+$ heroku config
+=== my-app Config Vars
+
+```
+
+At this point I have none set.
+
+I can set one with the `config:set` command and a key-value parameter.
+
+```bash
+$ heroku config:set PUBLIC_NEXT_URL=http://localhost:1235
+Setting PUBLIC_NEXT_URL and restarting ⬢ my-app... done, v3
+PUBLIC_NEXT_URL: http://localhost:1235
+```
+
+I can see the value that this specific variable is set to by calling it with
+`config:get`.
+
+```bash
+$ heroku config:get PUBLIC_NEXT_URL
+http://localhost:1235
+```
+
+[source](https://devcenter.heroku.com/articles/config-vars#using-the-heroku-cli)