why TypeOrm is not connect to MySQL in digital ocean server

[TypeOrmModule] Unable to connect to the database. Retrying (5)... +3004ms
Error: connect ECONNREFUSED
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16)
    at Protocol._enqueue (/var/www/myapp/node_modules/mysql/lib/protocol/Protocol.js:144:48)
    at Protocol.handshake (/var/www/myapp/node_modules/mysql/lib/protocol/Protocol.js:51:23)
    at PoolConnection.connect (/var/www/myapp/node_modules/mysql/lib/Connection.js:116:18)
    at Pool.getConnection (/var/www/myapp/node_modules/mysql/lib/Pool.js:48:16)
    at /var/www/myapp/node_modules/typeorm/driver/mysql/MysqlDriver.js:794:18
    at new Promise (<anonymous>)
    at MysqlDriver.createPool (/var/www/myapp/node_modules/typeorm/driver/mysql/MysqlDriver.js:791:16)
    at MysqlDriver.<anonymous> (/var/www/myapp/node_modules/typeorm/driver/mysql/MysqlDriver.js:278:51)
    at step (/var/www/myapp/node_modules/tslib/tslib.js:136:27)
    at (/var/www/myapp/node_modules/tslib/tslib.js:117:57)
    at /var/www/myapp/node_modules/tslib/tslib.js:110:75
    at new Promise (<anonymous>)
    at Object.__awaiter (/var/www/myapp/node_modules/tslib/tslib.js:106:16)
    at MysqlDriver.connect (/var/www/myapp/node_modules/typeorm/driver/mysql/MysqlDriver.js:263:24)
    at Connection.<anonymous> (/var/www/myapp/node_modules/typeorm/connection/Connection.js:112:58)
    at step (/var/www/myapp/node_modules/tslib/tslib.js:136:27)

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As you are connecting from an external server, you need to allow remote connections for your MySQL server.

You can follow the steps on how to do that here:

Regards, Bobby