Add docker

src/main/kotlin/modules/admin/Entity.kt

@@ -1,5 +1,6 @@
 package cc.essaenko.modules.admin
 
+import kotlinx.serialization.Serializable
 import org.ktorm.entity.Entity
 import org.ktorm.schema.*
 import java.time.LocalDateTime
@@ -13,7 +14,15 @@ interface AdminEntity : Entity<AdminEntity> {
     var lastLoginAt: LocalDateTime?
 }
 
-object AdminUsers : Table<AdminEntity>("admin_user") {
+@Serializable
+data class AdminDTO(
+    val id: Long,
+    val username: String,
+    @Serializable(with = JavaLocalDateTimeSerializer::class)
+    val createdAt: LocalDateTime,
+)
+
+object AdminUsers : Table<AdminEntity>("t_admins") {
     val id           = long("id").primaryKey().bindTo { it.id }
     val username     = varchar("username").bindTo { it.username }
     val password = varchar("password_hash").bindTo { it.password }