Update devcontainer.json (#147)

.devcontainer/devcontainer.json

@@ -2,7 +2,7 @@
 // README at: https://github.com/devcontainers/templates/tree/main/src/typescript-node 
 {
 	"name": "TalkForm",
-
+	"image": "mcr.microsoft.com/devcontainers/javascript-node:0-18",
 	// https://community.doppler.com/t/vscode-container-support/104
 	// https://community.doppler.com/t/doppler-and-github-codespaces/989/2
 	"containerEnv": {
@@ -31,16 +31,14 @@
 			"requireLocalPort": true
 		}
 	},
-	"postStartCommand": "nohup bash -c 'ellipsis listener start . &'", // This allows Ellipsis to write file changes in the codespace.
 
 	"remoteEnv": {
 		// Present because this repository is for internal testing.
 		"ELLIPSIS_API_URL": "https://bitbuilder-beta.up.railway.app"
 	},
 
-	// TODO can't get the yarn install within Dockerfile to show up in dev container.
-	// This also seems to be what the Microsoft example devcontainers do.
-	"postCreateCommand": "yarn install --frozen-lockfile",
+	"onCreateCommand": "yarn install --frozen-lockfile",
+	"postCreateCommand": "nohup bash -c 'bb listener start . &'",
 
 	// Configure tool-specific properties.
 	"customizations": {