chore: rename db url env variable

Author: hrideshmg

.env.sample

@@ -5,7 +5,7 @@ POSTGRES_DB=
 POSTGRES_HOST=localhost
 
 # Root env
-DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:5432/${POSTGRES_DB}
+ROOT_DB_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:5432/${POSTGRES_DB}
 RUST_ENV=development
 ROOT_SECRET=insecuresecret123 # Used to verify origin of attendance mutations
 ROOT_PORT=3000

src/main.rs

@@ -31,7 +31,7 @@ impl Config {
         Self {
             env: std::env::var("ROOT_ENV").unwrap_or_else(|_| "development".to_string()),
             secret_key: std::env::var("ROOT_SECRET").expect("ROOT_SECRET must be set."),
-            database_url: std::env::var("DATABASE_URL").expect("DATABASE_URL must be set."),
+            database_url: std::env::var("ROOT_DB_URL").expect("ROOT_DB_URL must be set."),
             port: std::env::var("ROOT_PORT").expect("ROOT_PORT must be set."),
         }
     }