FIX 完善devops流程

db/migrate/20200710124116_create_dev_ops_languages.rb

@@ -0,0 +1,11 @@
+class CreateDevOpsLanguages < ActiveRecord::Migration[5.2]
+  def change
+    create_table :dev_ops_languages do |t|
+      t.string :name, null: false, comment: 'The name of project language.'
+      t.text :content, null: false, comment: 'The content of project language.'
+      t.integer :usage_amount, default: 0, comment: 'number of people Using the language'
+
+      t.timestamps
+    end
+  end
+end