Allow using dotenv for setup

Author: Kuuuube

.env_template

@@ -0,0 +1,2 @@
+DISCORD_TOKEN=
+GITHUB_TOKEN=

.gitignore

@@ -3,3 +3,4 @@
 result
 target/
 state.json
+.env

Cargo.lock

@@ -23,3 +23,4 @@ reqwest = "0.11.22"
 hex = "0.4.3"
 to-arraystring = "0.1.3"
 arrayvec = "0.7.4"
+dotenvy = "0.15.7"

Cargo.toml

@@ -68,6 +68,8 @@ async fn on_error(error: poise::FrameworkError<'_, Data, Error>) {
 
 #[tokio::main]
 async fn main() {
+    let _ = dotenvy::dotenv();
+
     let discord_token = env::var("DISCORD_TOKEN").expect("Expected discord api token");
     let github_token = env::var("GITHUB_TOKEN").expect("Expected github api token");