fix: stable db migration + beta migration to stable

server/db/beta/migrations/2.0.0-rc.29.js

@@ -0,0 +1,20 @@
+/* global WIKI */
+
+exports.up = knex => {
+  return knex.schema
+    .table('pages', table => {
+      switch (WIKI.config.db.type) {
+        case 'mariadb':
+        case 'mysql':
+          table.specificType('content', 'LONGTEXT').alter()
+          table.specificType('render', 'LONGTEXT').alter()
+          break
+        case 'mssql':
+          table.specificType('content', 'VARCHAR(max)').alter()
+          table.specificType('render', 'VARCHAR(max)').alter()
+          break
+      }
+    })
+}
+
+exports.down = knex => { }