use config file instead of env

config/config.example.yml

@@ -0,0 +1,15 @@
+app:
+    name: Pangolin
+    environment: dev
+    base_url: http://localhost:3000
+    log_level: debug
+    save_logs: "false"
+    secure_cookies: "false"
+
+server:
+    external_port: "3000"
+    internal_port: "3001"
+
+rate_limit:
+    window_minutes: "1"
+    max_requests: "100"