Web Worker Sign Out and Use Go API (#13)

* Calculate checksum and send with file upload

* Limit file upload and display rejected file error

* Add sign in timeout

* Check auth token structure before setting
Clean up

* Use web worker timer to sign out
Remove checksum
Point to Go ota update

* Remove checksum dependency

src/components/App/__snapshots__/App.test.js.snap

@@ -30,7 +30,6 @@ exports[`App Route / authenticated 1`] = `
               <input
                 accept=""
                 autocomplete="off"
-                multiple=""
                 style="display: none;"
                 tabindex="-1"
                 type="file"
@@ -263,7 +262,6 @@ exports[`App Route /home authenticated 1`] = `
               <input
                 accept=""
                 autocomplete="off"
-                multiple=""
                 style="display: none;"
                 tabindex="-1"
                 type="file"
@@ -532,7 +530,6 @@ exports[`App Route /signup authenticated 1`] = `
               <input
                 accept=""
                 autocomplete="off"
-                multiple=""
                 style="display: none;"
                 tabindex="-1"
                 type="file"