feat: include Binder with preset notebook & warning about notes.md

lessons/0/exercise.ipynb

@@ -3,14 +3,20 @@
         {
             "cell_type": "markdown",
             "metadata": {},
-            "source": ["# Exercise 0: Total rows"]
+            "source": [
+                "# Exercise 0: Total rows\n",
+                "\n",
+                "Using a qsv command, get the total number of rows that are in the `fruits.csv` file."
+            ]
         },
         {
             "cell_type": "code",
             "execution_count": null,
             "metadata": {},
             "outputs": [],
-            "source": []
+            "source": [
+                "qsv --list"
+            ]
         }
     ],
     "metadata": {

lessons/0/notes.md

@@ -9,7 +9,7 @@ kernelspec:
     name: bash
 ---
 
-# Getting help
+# Lesson 0: Exploring qsv help messages and syntax
 
 ## Listing all commands
 
@@ -68,9 +68,11 @@ Now it's your turn to take on the first exercise.
 
 ## Exercise 0: Total rows
 
+[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/dathere/100.dathere.com/main?labpath=lessons%2F0%2Fexercise.ipynb)
+
 Using a qsv command, get the total number of rows that are in the `fruits.csv` file.
 
-> Here we list qsv commands for your reference. Solve this exercise using [Thebe](exercises-setup:thebe) or [locally](exercises-setup:local).
+> Here we list qsv commands for your reference. Solve this exercise using [Thebe](exercises-setup:thebe), [Binder](exercises-setup:binder) or [locally](exercises-setup:local).
 
 ```{code-cell}
 :tags: ["scroll-output"]