add app setting letter out

internal/router/health_handler.go

@@ -59,6 +59,8 @@ type MasterHandler interface {
 	UpdateDispositionAction(c *gin.Context)
 	DeleteDispositionAction(c *gin.Context)
 	ListDispositionActions(c *gin.Context)
+	// departments
+	ListDepartments(c *gin.Context)
 }
 
 type LetterHandler interface {

internal/router/router.go

@@ -143,6 +143,8 @@ func (r *Router) addAppRoutes(rg *gin.Engine) {
 			master.POST("/disposition-actions", r.masterHandler.CreateDispositionAction)
 			master.PUT("/disposition-actions/:id", r.masterHandler.UpdateDispositionAction)
 			master.DELETE("/disposition-actions/:id", r.masterHandler.DeleteDispositionAction)
+
+			master.GET("/departments", r.masterHandler.ListDepartments)
 		}
 
 		lettersch := v1.Group("/letters")