Update clippy and env example.

.env.example

@@ -0,0 +1,2 @@
+DB_FILE_PATH=./.data/db.sqlite
+APPLICATION_PORT=8000

src/db.rs

@@ -17,10 +17,7 @@ use crate::models::{
 /// # Error
 /// libsql::Error
 pub async fn start_db() -> Result<Database, Error> {
- let db_url = match env::var("DB_URL") {
- Ok(url) => url,
- Err(_) => String::new(),
- };
+ let db_url = env::var("DB_URL").unwrap_or_default();
  let db_file_path = match env::var("DB_FILE_PATH") {
  Ok(file_path) => file_path,
  Err(_) => {

src/main.rs

@@ -1,17 +1,14 @@
 use actix_web::rt;
 use dotenvy::dotenv;
-use std::{env::var, net::TcpListener};
+use std::{env, net::TcpListener};
 
 use zero2prod::{jobs::process::process_job, startup::run};
 
 #[actix_web::main]
 async fn main() -> Result<(), std::io::Error> {
  dotenv().expect("No .env file found");
 
- let application_port = match var("APPLICATION_PORT") {
- Ok(s) => s,
- Err(_) => "8000".to_string(),
- };
+ let application_port = env::var("APPLICATION_PORT").unwrap_or("8000".to_string());
 
  let address = format!("0.0.0.0:{}", application_port);
  let listener = TcpListener::bind(address)?;