feat: allow to use custom port with a .env file

.gitignore

@@ -1,2 +1,3 @@
 /target
 database.db
+.env

Cargo.lock

@@ -212,6 +212,12 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "dotenvy"
+version = "0.15.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1aaf95b3e5c8f23aa320147307562d361db0ae0d51242340f558153b4eb2439b"
+
 [[package]]
 name = "fallible-iterator"
 version = "0.3.0"
@@ -683,6 +689,7 @@ version = "0.1.0"
 dependencies = [
  "argon2",
  "axum",
+ "dotenvy",
  "rand",
  "rusqlite",
  "tokio",

Cargo.toml

@@ -6,6 +6,7 @@ edition = "2021"
 [dependencies]
 argon2 = { version = "0.5.3", features = ["password-hash", "rand"] }
 axum = "0.7.5"
+dotenvy = "0.15.7"
 rand = "0.8.5"
 rusqlite = "0.32.1"
 tokio = { version = "1.39.2", features = ["full"] }

src/main.rs

@@ -10,9 +10,15 @@ async fn main() {
     let connection = Connection::open("database.db").expect("Failed to open database");
     db::init(&connection).expect("Failed to create database");
 
+    dotenvy::dotenv().ok();
+
     let app = Router::new();
 
-    let addr = SocketAddr::from(([0, 0, 0, 0], 3000));
+    let port = std::env::var("PORT")
+        .unwrap_or_else(|_| "3000".to_string())
+        .parse()
+        .expect("PORT must be an unsigned number");
+    let addr = SocketAddr::from(([0, 0, 0, 0], port));
     let listener = tokio::net::TcpListener::bind(&addr).await.unwrap();
 
     axum::serve(listener, app).await.unwrap();