added extensions to devcontainer and added github action build script

.devcontainer/devcontainer.json

@@ -4,22 +4,23 @@
 	"name": "React",
 	"image": "mcr.microsoft.com/devcontainers/typescript-node:1-22-bookworm",
 
-	// Features to add to the dev container. More info: https://containers.dev/features.
 	"features": {
 	},
 
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	"forwardPorts": [5173],
 
 	"customizations": {
 		"vscode": {
 			"settings": {
 				"terminal.integrated.shell.linux": "/bin/bash"
-			}
+			},
+			"extensions": [
+				"GitHub.vscode-github-actions",
+				"dbaeumer.vscode-eslint",
+				"GitHub.copilot",
+				"ms-vscode-remote.remote-containers"
+			]
 		}
 	},
 	"postCreateCommand": "npm install"
-
-	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
-	// "remoteUser": "root"
 }