chore: remove CRA and move to a pure esbuild build

react-scripts is deprecated and its dependencies are a source of vulnerabilties.

This moves the build to a pure esbuild more in line with other projects.

Author: dmacvicar

.gitignore

@@ -36,6 +36,8 @@ bower_components
 
 # Compiled binary addons (https://nodejs.org/api/addons.html)
 build/Release
+ui/build
+ui/test-results
 
 # Dependency directories
 node_modules/
@@ -101,3 +103,6 @@ dist
 
 # TernJS port file
 .tern-port
+
+# Downloaded binaries
+binaries

Makefile

@@ -21,7 +21,7 @@ debug: ## Start the extension in debug mode
 
 hot-reload: ## Enable hot reloading
 	docker extension dev ui-source $(IMAGE) http://localhost:3000
-	cd ui/ && npm start
+	cd ui/ && npm run dev
 
 stop-hot-realoading: ## Disable hot reloading
 	docker extension dev reset $(IMAGE)