Add ability to pull environment variables from a .env file (#39)

Author: flamion

Cargo.lock

@@ -30,6 +30,7 @@ thiserror = "1.0.31"
 anyhow = "1.0.57"
 
 lazy_static = "1.4.0"
+dotenv = "0.15.0"
 
 [dependencies.sqlx]
 version = "0.5.13"

Cargo.toml

@@ -39,6 +39,7 @@ environment variable.
 #### Environment Variables
 A few things can also be configured via environment variables.
 Generally most things that can be configured via an environment variable can also be configured via the config file.
+Shorty will also look for a .env file in the same directory it's executed from and pull environment variables from there.
 
 `SHORTY_CONFIG` was mentioned before. With it you can set a custom location for the config file. 
 By default shorty will look for the config file in the current folder. This can obviously not be configured 

README.md

@@ -18,6 +18,8 @@ pub enum ShortyError {
 	#[error(transparent)]
 	Database(#[from] sqlx::Error),
 	#[error(transparent)]
+	Dotenv(#[from] dotenv::Error),
+	#[error(transparent)]
 	Other(#[from] anyhow::Error),
 }
 

src/error.rs

@@ -139,6 +139,8 @@ async fn get_favicon() -> Result<impl Responder, ShortyError> {
 
 #[tokio::main]
 async fn main() -> Result<(), ShortyError> {
+	dotenv::dotenv()?;
+
 	let env_filter = EnvFilter::from_default_env()
 		.add_directive(Level::INFO.into())
 		.add_directive("shorty=debug".parse().unwrap());