ft: added dotenv for .env file

.gitignore

@@ -1,2 +1,3 @@
 /target
 output.png
+.env

Cargo.lock

@@ -280,6 +280,12 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
 
+[[package]]
+name = "dotenv"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77c90badedccf4105eca100756a0b1289e191f6fcbdadd3cee1d2f614f97da8f"
+
 [[package]]
 name = "either"
 version = "1.15.0"
@@ -1227,6 +1233,7 @@ dependencies = [
 name = "raytracing"
 version = "0.1.0"
 dependencies = [
+ "dotenv",
  "image",
  "is_close",
  "log",

Cargo.toml

@@ -4,6 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+dotenv = "0.15.0"
 image = "0.25.10"
 is_close = "0.1.3"
 log = "0.4.29"

env.example

@@ -0,0 +1 @@
+RUST_LOG=info

src/main.rs

@@ -13,9 +13,11 @@ use crate::objects::materials::lambertian::{Lambertian, Metal};
 use crate::objects::sphere::Sphere;
 use crate::ray::Ray;
 use crate::vec3::Vec3;
+use dotenv::dotenv;
 use pretty_env_logger;
 
 fn main() {
+    dotenv().ok();
     pretty_env_logger::init();
 
     // setup objects