feat: Add openapi explorer (#529)

server/src/V2/endpoints/openapi.ts

@@ -0,0 +1,18 @@
+
+import express from 'express'
+import fs from 'node:fs'
+import swaggerUi from 'swagger-ui-express'
+import YAML from 'yaml'
+
+const file = fs.readFileSync('./public/v2/openapi.yaml', 'utf8')
+const swaggerDocument = YAML.parse(file)
+
+const server = express.Router()
+
+server.use('/', swaggerUi.serve, swaggerUi.setup(swaggerDocument, {
+	customCss: '.topbar { display: none }',
+	customfavIcon: '/favicon.ico',
+	customSiteTitle: 'Openapi documentation - TCGdex API'
+}))
+
+export default server