support HTTPS

package.json

@@ -8,7 +8,7 @@
     "react-scripts-ts": "2.8.0"
   },
   "scripts": {
-    "start": "react-scripts-ts start",
+    "start": "cross-env HTTPS=true react-scripts-ts start",
     "build": "react-scripts-ts build",
     "test": "react-scripts-ts test --env=jsdom",
     "eject": "react-scripts-ts eject"
@@ -17,6 +17,7 @@
     "@types/jest": "^21.1.5",
     "@types/node": "^8.0.47",
     "@types/react": "^16.0.20",
-    "@types/react-dom": "^16.0.2"
+    "@types/react-dom": "^16.0.2",
+    "cross-env": "^5.1.1"
   }
 }

yarn.lock

@@ -1048,7 +1048,14 @@ create-hmac@^1.1.0, create-hmac@^1.1.2, create-hmac@^1.1.4:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
-[email protected], cross-spawn@^5.0.1:
+cross-env@^5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-5.1.1.tgz#b6d8ab97f304c0f71dae7277b75fe424c08dfa74"
+  dependencies:
+    cross-spawn "^5.1.0"
+    is-windows "^1.0.0"
+
+[email protected], cross-spawn@^5.0.1, cross-spawn@^5.1.0:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
   dependencies:
@@ -2584,7 +2591,7 @@ is-utf8@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-utf8/-/is-utf8-0.2.1.tgz#4b0da1442104d1b336340e80797e865cf39f7d72"
 
-is-windows@^1.0.1:
+is-windows@^1.0.0, is-windows@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-windows/-/is-windows-1.0.1.tgz#310db70f742d259a16a369202b51af84233310d9"