chore: create dev env docker image

Co-authored-by: Ona <no-reply@ona.com>

.devcontainer/devcontainer.json

@@ -1,6 +1,9 @@
 {
 	"name": "React + Bun + Convex Development",
-	"image": "mcr.microsoft.com/devcontainers/javascript-node:24",
+	"build": {
+		"context": ".",
+		"dockerfile": "Dockerfile"
+	},
 	"features": {
 		"ghcr.io/devcontainers/features/git:1": {},
 		"ghcr.io/devcontainers/features/github-cli:1": {},
@@ -8,7 +11,7 @@
 			"moby": false
 		}
 	},
-	"postCreateCommand": "curl -fsSL https://bun.sh/install | bash && source ~/.bashrc && bun install",
+	"postCreateCommand": "bun install",
 	"customizations": {
 		"vscode": {
 			"extensions": [