add basic backend code

web/backend/package.json

@@ -0,0 +1,28 @@
+{
+  "name": "backend",
+  "version": "1.0.0",
+  "private": true,
+  "author": "Pacharapol Withayasakpunt <patarapolw@gmail.com> (https://polvcode.dev)",
+  "license": "MIT",
+  "scripts": {
+    "dev": "ts-node-dev src/index.ts"
+  },
+  "dependencies": {
+    "cheerio": "^1.0.0-rc.3",
+    "cors": "^2.8.5",
+    "express": "^4.17.1",
+    "pug": "^2.0.4",
+    "scope-css": "^1.2.1",
+    "showdown": "^1.9.1"
+  },
+  "devDependencies": {
+    "@types/cheerio": "^0.22.16",
+    "@types/cors": "^2.8.6",
+    "@types/express": "^4.17.2",
+    "@types/node": "^13.7.6",
+    "@types/pug": "^2.0.4",
+    "@types/showdown": "^1.9.3",
+    "ts-node-dev": "^1.0.0-pre.44",
+    "typescript": "^3.8.2"
+  }
+}