Add SEASON env var (#173)

* feat: update season configuration in environment and code

Author: diegofcornejo

.env.example

@@ -6,4 +6,5 @@ POSTGRES_PASSWORD=your-postgres-password
 POSTGRES_DB=your-postgres-database
 POSTGRES_HOST=your-postgres-host
 POSTGRES_PORT=your-postgres-port
-RANK_ENABLED=false
+RANK_ENABLED=false
+SEASON=5

src/config/index.ts

@@ -19,5 +19,5 @@ export const config = {
 	ranking: {
 		enabled: process.env.RANK_ENABLED === "true",
 	},
-	season: 4,
+	season: Number(process.env.SEASON),
 };