feat!: Add JWT

- `RUSTDESK_API_JWT_KEY`如果设置，将会启用JWT，token自动续期功能将失效
- 此功能是为了server端校验token的合法性

conf/config.yaml

@@ -36,6 +36,9 @@ logger:
 proxy:
   enable: false
   host: "http://127.0.0.1:1080"
+jwt:
+  key: ""
+  expire-duration: 360000
 redis:
   addr: "127.0.0.1:6379"
   password: ""
@@ -53,6 +56,4 @@ oss:
   callback-url: ""
   expire-time: 30
   max-byte: 10240
-jwt:
-  private-key: "./conf/jwt_pri.pem"
-  expire-duration: 360000
+