Added express to dependecies

package.json

@@ -38,6 +38,7 @@
     "chalk": "2.4.1",
     "css-loader": "1.0.0",
     "dotenv": "6.0.0",
+    "express": "4.16.4",
     "file-loader": "3.0.1",
     "fs-extra": "7.0.0",
     "jest": "23.6.0",

yarn.lock

@@ -3387,6 +3387,42 @@ expect@^23.6.0:
     jest-message-util "^23.4.0"
     jest-regex-util "^23.3.0"
 
+express@4.16.4:
+  version "4.16.4"
+  resolved "https://registry.yarnpkg.com/express/-/express-4.16.4.tgz#fddef61926109e24c515ea97fd2f1bdbf62df12e"
+  integrity sha512-j12Uuyb4FMrd/qQAm6uCHAkPtO8FDTRJZBDd5D2KOL2eLaz1yUNdUB/NOIyq0iU4q4cFarsUCrnFDPBcnksuOg==
+  dependencies:
+    accepts "~1.3.5"
+    array-flatten "1.1.1"
+    body-parser "1.18.3"
+    content-disposition "0.5.2"
+    content-type "~1.0.4"
+    cookie "0.3.1"
+    cookie-signature "1.0.6"
+    debug "2.6.9"
+    depd "~1.1.2"
+    encodeurl "~1.0.2"
+    escape-html "~1.0.3"
+    etag "~1.8.1"
+    finalhandler "1.1.1"
+    fresh "0.5.2"
+    merge-descriptors "1.0.1"
+    methods "~1.1.2"
+    on-finished "~2.3.0"
+    parseurl "~1.3.2"
+    path-to-regexp "0.1.7"
+    proxy-addr "~2.0.4"
+    qs "6.5.2"
+    range-parser "~1.2.0"
+    safe-buffer "5.1.2"
+    send "0.16.2"
+    serve-static "1.13.2"
+    setprototypeof "1.1.0"
+    statuses "~1.4.0"
+    type-is "~1.6.16"
+    utils-merge "1.0.1"
+    vary "~1.1.2"
+
 express@^4.16.2:
   version "4.16.4"
   resolved "https://registry.npmjs.org/express/-/express-4.16.4.tgz#fddef61926109e24c515ea97fd2f1bdbf62df12e"