Add initial framework of configuration.

feat: configuration file system of app.

Note: still work in progress.

config.example.yaml

@@ -1,3 +1,17 @@
 server:
     host: 0.0.0.0
     port: 10086
+
+database:
+    driver: sqlite3
+    path: data/mygo.db
+
+storage:
+    driver: local
+    local:
+        path: data/files
+
+jwt:
+    secret: change-me-in-production
+    access_ttl: 15m
+    refresh_ttl: 168h