Adds logo asset, adds env var placeholders, adds 404 page

src/utils/get-keys.ts

@@ -2,8 +2,6 @@
 const keys = {
   shodan: process.env.REACT_APP_SHODAN_API_KEY,
   whoApi: process.env.REACT_APP_WHO_API_KEY,
-  builtWith: process.env.REACT_APP_BUILT_WITH_API_KEY,
-  googleCloud: process.env.REACT_APP_GOOGLE_CLOUD_API_KEY,
 };
 
 export default keys;