Feat/excel (#45)

* add dependency

adding dependency to parse the excel file in the node side

* import file

ability to import file
- add extension
- safeguard file type and size

* user is able to upload json or excel

* chore: extract logic into self contained function

* associate model with version

* test id generation

* parse excel data

* prevent UI crash on bad data

* extract validation into self contained function

* chore: add more tests for bad data

* config: stop from opening browser on start

* fix comma in sample db

* handle corrupt files

* error boundary around main components

* jsdocs

* increase id length

* parse excel time string

* feat: excel parsing

* validate json db before import

* chore: test event validator

* feat: make function to clean convert strings

* chore: test parser

* chore: jsdocs

* fix: bug on upload

prevent bug where the component would prevent upload of same file twice

server/src/utils/generate_id.js

@@ -0,0 +1,4 @@
+import { customAlphabet } from 'nanoid';
+const nanoid = customAlphabet('1234567890abcdef', 5);
+
+export const generateId = () => nanoid();