prevent huge data amounts, separate sources

lib/db/log.js

@@ -8,7 +8,7 @@
 'use strict';
 
 module.exports = (get_db) => ({
-  get_all (app_id) {
+  get_all (app_id, limit = 100, offset = 0) {
     const knex = get_db ();
     return knex.select (
       'id',
@@ -17,7 +17,10 @@ module.exports = (get_db) => ({
       'timestamp'
     )
       .from ('log')
-      .where ({ app_id });
+      .where ({ app_id })
+      .orderBy ('timestamp')
+      .limit (Math.min (limit, 10000))
+      .offset (offset);
   },
   insert (app_id, message, data = '{}', timestamp = (new Date)) {
     const knex = get_db ();