chore: add prettier

.prettierrc

@@ -0,0 +1,5 @@
+semi: true
+tabWidth: 2
+singleQuote: true
+printWidth: 80
+trailingComma: none

package.json

@@ -8,7 +8,8 @@
     "dist"
   ],
   "scripts": {
-    "build": "tsc"
+    "build": "tsc",
+    "dev": "tsc -w"
   },
   "keywords": [
     "vite",
@@ -34,6 +35,7 @@
     "@types/fs-extra": "^9.0.8",
     "@types/node": "^14.14.31",
     "@types/serve-static": "^1.13.9",
+    "prettier": "^2.2.1",
     "typescript": "^4.2.2",
     "vite": "^2.0.4"
   },

yarn.lock

@@ -236,6 +236,11 @@ postcss@^8.2.1:
     nanoid "^3.1.20"
     source-map "^0.6.1"
 
+prettier@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.npm.taobao.org/prettier/download/prettier-2.2.1.tgz?cache=0&sync_timestamp=1606523097359&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fprettier%2Fdownload%2Fprettier-2.2.1.tgz#795a1a78dd52f073da0cd42b21f9c91381923ff5"
+  integrity sha1-eVoaeN1S8HPaDNQrIfnJE4GSP/U=
+
 range-parser@~1.2.1:
   version "1.2.1"
   resolved "https://registry.npm.taobao.org/range-parser/download/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"