modified: package-lock.json
modified: package.json
new file: public/answer.html
new file: public/choice.html
new file: public/demo.html
new file: public/demo2.html
new file: public/dianming.html
new file: public/index.html
new file: public/lottery.html
new file: public/score_display.html
new file: public/select.html
modified: router.js
renamed: app.js -> server.js
modified: services/classManager.js
new file: services/delete-table.js
modified: services/randomSelect.js
modified: services/ranking.js
modified: services/scoreManager.js
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