chore: add eslint and cleanup (#118)

* refactor: modified existing react imports to conform with the recommended approach of not using the default export directly, since it will be deprecated in one of the future releases. see https://reactjs.org/blog/2020/09/22/introducing-the-new-jsx-transform.html for more info. note: react types don't require importing of react.
refactor: cleaned up some of the imports

* feat: added eslint and fixed all the errors/warning. eslint can now be invoked by running "npm run lint".
chore: updated .gitignore not to include unnecessary artefacts.
refactor: re-organized some of the imports.

* refactor: converted remaining few typed functional components to proper prop argument structure.

* fix: fixed small react-query invalidation bug for the FilterDetails component.

Co-authored-by: anonymous <anonymous>

web/src/utils/index.ts

@@ -25,14 +25,10 @@ export function baseUrl() {
 
 // get sseBaseUrl for SSE
 export function sseBaseUrl() {
-    let {origin} = window.location
+    if (process.env.NODE_ENV === "development")
+        return `http://localhost:8989/`;
 
-    let env = process.env.NODE_ENV
-    if (env === "development") {
-        return `http://localhost:8989/`
-    }
-
-    return `${origin}${baseUrl()}`
+    return `${window.location.origin}${baseUrl()}`;
 }
 
 export function buildPath(...args: string[]): string {