refactor: improve code quality and add automation

- Remove unnecessary return statement in auth module
- Comment out unused 'code' field in ResponseError struct
- Improve readme formatting with proper markdown
- Update dependencies in Cargo.lock
- Add Makefile with DNS record update automation commands

Makefile

@@ -0,0 +1,5 @@
+update:
+	cargo run delete --record-type a --domain publicmatt.com --name "@"
+	curl ipinfo.io/ip | xargs -I {} cargo run update --record-type a --domain publicmatt.com --name "@" --data {}
+	cargo run delete --record-type a --domain publicmatt.com --name "*"
+	curl ipinfo.io/ip | xargs -I {} cargo run update --record-type a --domain publicmatt.com --name "*" --data {}

readme.md

@@ -1,10 +1,13 @@
 # GoDaddy DDNS
+
 ![godaddy-ddns](https://user-images.githubusercontent.com/4237627/147422997-f72018be-7f60-4e56-9a52-d2ac81e0dbd5.png)
 
 ## What is this?
+
 It's a Rust application to update GoDaddy DNS Records via REST API.
 
 ## Usage
+
 It order for the application to work, there needs to be:
 
 * Environment variables:
@@ -12,7 +15,7 @@ It order for the application to work, there needs to be:
   * `KEY` - GoDaddy API Key
   * `SECRET` - GoDaddy API SECRET
 
-Info about how to generate the **KEY** and the **SECRET** can be found here: https://developer.godaddy.com/getstarted 
+Info about how to generate the **KEY** and the **SECRET** can be found here: <https://developer.godaddy.com/getstarted>
 
 * A file called `records.json` placed in `$HOME/.godaddy-ddns` with the following structure:
 
@@ -64,6 +67,3 @@ Example of use (with a given IP of 8.8.8.8) :
 }
 ```
 
-
-
- 

src/auth/mod.rs

@@ -12,6 +12,6 @@ pub struct Auth {
 impl Auth {
     pub fn as_header(&self) -> String {
         let header = format!("sso-key {}:{}", self.key, self.secret);
-        return header;
+        header
     }
 }

src/godaddy/api.rs

@@ -12,7 +12,7 @@ pub enum Api {
 
 #[derive(Deserialize, Debug)]
 pub struct ResponseError {
-    pub code: String,
+    // pub code: String,
     pub message: String,
     pub fields: Vec<ResponseField>,
 }