prep for netlify integration

netlify.toml

+[[redirects]]
+  from = "/*"
+  to = "/index.html"
+  status = 200

package.json

 {
   "name": "uniswap",
-  "homepage": ".",
   "version": "0.1.0",
   "private": true,
   "dependencies": {
@@ -38,16 +37,13 @@
   },
   "scripts": {
     "start": "react-scripts start",
-    "start:rinkeby": "REACT_APP_NETWORK_ID=4 REACT_APP_NETWORK='Rinkeby Test Network' react-scripts start",
-    "build": "react-scripts build && cp build/index.html build/404.html",
-    "build:rinkeby": "REACT_APP_NETWORK_ID=4 REACT_APP_NETWORK='Rinkeby Test Network' react-scripts build && cp build/index.html build/404.html",
+    "start:rinkeby": "REACT_APP_NETWORK_ID=4 REACT_APP_NETWORK='Rinkeby Test Network' yarn start",
+    "build": "react-scripts build",
+    "build:rinkeby": "REACT_APP_NETWORK_ID=4 REACT_APP_NETWORK='Rinkeby Test Network' yarn build",
     "test": "react-scripts test --env=jsdom",
-    "eject": "react-scripts eject",
-    "deploy": "npm run build&&gh-pages -d build"
-  },
-  "devDependencies": {
-    "gh-pages": "^1.1.0"
+    "eject": "react-scripts eject"
   },
+  "devDependencies": {},
   "browserslist": [
     ">0.2%",
     "not dead",