update attendee schema to binary so we can encrypt all the fields

src/fields/01-setup.md

@@ -19,9 +19,12 @@ Create a New Phoenix App:
 mix phx.new fields_demo --no-mailer --no-dashboard --no-gettext
 ```
 
-> **Note**: We don't need to send email, 
-> have a fancy dashboard or translation in this `demo`.
-> All these _advanced_ features are covered later.
+> **Note**: The "flags" (e.g: `--no-mailer`) 
+> after the `fields_demo` app name
+> are there to avoid adding bloat to our app. 
+> We don't need to send `email`, 
+> have a fancy `dashboard` or `translation` in this `demo`.
+> All these _advanced_ features are all covered in depth later.
 
 
 ## 2. Setup Coverage
@@ -158,4 +161,4 @@ you should see something similar to the following:
 <img width="796" alt="image" src="https://github.com/dwyl/fields/assets/194400/891e890e-c94a-402e-baee-ee47fd3725a7">
 
 That completes 2 minutes of "setup".
-Let's add a schema!
+Let's add a `schema` to store the data!

src/fields/02-schema.md

@@ -1,6 +1,6 @@
 # Create `attendee` schema
 
-The goal is to allow `people` attending **_Awesome_ Conf**
+The goal is to allow `people` attending **_Awesome_ Conf** - the ***`attendees`*** -
 to submit the following data:
 
 + `first_name` - how we greet you. Will appear on your conference pass.
@@ -24,7 +24,7 @@ Using the
 command, 
 run: 
 ```sh
-mix phx.gen.live Accounts Attendee attendees first_name:string last_name:string email:string phone_number:string address_line_1:string address_line_2 postcode:string gender:string diet_pref:string website:string desc:string feedback:string
+mix phx.gen.live Accounts Attendee attendees first_name:binary last_name:binary email:binary phone_number:binary address_line_1:binary address_line_2:binary postcode:binary gender:binary diet_pref:binary website:binary desc:binary feedback:binary
 ```
 
 You should expect to see output similar to the following:

src/fields/README.md

@@ -2,16 +2,18 @@
 
 # `Fields` Guide
 
-A **complete beginner's guide**
-to building a **`Phoenix` Web App**
+This chapter is a **complete beginner's guide**
+to building a fully-functional **Web Application** <br />
+in **`Phoenix`**
 using **`fields`**
 to **_appropriately_ store personal data**.
 
-![awesome-header-image](https://github.com/dwyl/fields-demo/assets/194400/a87a35ab-409d-4204-8b9f-8d4725b505f0)
 
 </div>
 
+<!--
 # TODO: insert screenshot of working `fields-demo` app.
+-->
 
 ## Why?
 
@@ -25,14 +27,28 @@ Most beginner's guides
 gloss over the steps 
 we are about to take together.
 If you care about your _own_ privacy - and you should! -
-don't skip this chapter.
+follow along 
+and see how _easy_ it is to do the _right_ thing.
+
+### Why Build This Demo App _First_? 
+
+Simple: to showcase how straightforward it is
+to transparently validate, encrypt and decrypt 
+sensitive personal data
+in an ultra-basic but fully-functional web app. 
+
+We will then _use_ these techniques
+to build something more advanced.
 
 ## What?
 
-The `fields-demo` App
+The **`fields-demo`** App
 showcases a **registration form**
 for a (fictitious) conference called "**_Awesome_ Conf**".
-It shows you all the steps necessary
+
+![awesome-header-image](https://github.com/dwyl/fields-demo/assets/194400/a87a35ab-409d-4204-8b9f-8d4725b505f0)
+
+It covers all the steps necessary
 to build the form
 using the `fields` package
 to securely store personal data.