增加开源协议，并支持对应文件下载

app/controllers/apply_signatures_controller.rb

@@ -12,11 +12,12 @@ class ApplySignaturesController < ApplicationController
   end
 
   def template_file
-    license = License.find_by_name("PHengLEI")
+    license_name = params[:license_name] || "PHengLEI"
+    license = License.find_by_name(license_name)
     file = license.attachments.take
     # normal_status(-1, "文件不存在") if file.blank?
     if file.blank?
-      send_file("#{Rails.root.to_s}/public/PHengLEI-License.docx", filename: "PHengLEI软件开源协议.docx",stream:false, type: 'application/octet-stream')
+      send_file("#{Rails.root.to_s}/public/#{license_name}-License.docx", filename: "#{license_name}软件开源协议.docx",stream:false, type: 'application/octet-stream')
     else
       send_file(absolute_path(local_path(file)), filename: file.title,stream:false, type: file.content_type.presence || 'application/octet-stream')
     end

app/views/projects/index.json.jbuilder

@@ -11,6 +11,7 @@ json.projects @rand_projects do |project|
   json.forked_count project.forked_count.to_i
   json.is_public project.is_public
   json.is_secret project.is_secret
+  json.license_name project.license&.name
   json.mirror_url project.repository&.mirror_url
   json.type project&.numerical_for_project_type
   json.last_update_time render_unix_time(project.updated_on)