Update dev container (#849)

* Update dev container

* Address comments

* Add variant back to base file

* Remove variant from devcontainer.json

.devcontainer/Dockerfile

@@ -1,8 +1,14 @@
-FROM node:lts
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.158.0/containers/typescript-node/.devcontainer/base.Dockerfile
 
-WORKDIR /workspaces
+ARG VARIANT="14"
+FROM mcr.microsoft.com/vscode/devcontainers/typescript-node:0-${VARIANT}
 
 # Set an environment variable to be able to detect we are in dev container
 ENV NODE_ENV=devcontainer
 
 EXPOSE 3000
+
+COPY .nvmrc /tmp/.nvmrc
+RUN \
+  su node -c \
+    "source /usr/local/share/nvm/nvm.sh && nvm install $(cat /tmp/.nvmrc) 2>&1"

.devcontainer/devcontainer.json

@@ -1,29 +1,29 @@
 {
   "name": "developers.home-assistant",
-    "dockerFile": "Dockerfile",
-    "appPort": [
-        3000
-    ],
-    "postCreateCommand": "yarn install",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": ".."
+  },
+  "appPort": [3000],
+  "postCreateCommand": "script/setup",
   "extensions": [
     "davidanson.vscode-markdownlint",
     "editorconfig.editorconfig",
     "streetsidesoftware.code-spell-checker",
-        "yzhang.markdown-all-in-one"
+    "yzhang.markdown-all-in-one",
+    "esbenp.prettier-vscode"
   ],
   "settings": {
     "editor.rulers": [80, 100, 120],
     "editor.renderWhitespace": "boundary",
     "errorLens.gutterIconsEnabled": true,
     "errorLens.addAnnotationTextPrefixes": false,
-        "errorLens.enabledDiagnosticLevels": [
-            "error",
-            "warning"
-        ],
-        "terminal.integrated.shell.linux": "/bin/bash",
+    "errorLens.enabledDiagnosticLevels": ["error", "warning"],
     "[markdown]": {
       "editor.wordWrap": "wordWrapColumn",
-            "editor.wordWrapColumn": 80,
-        }
+      "editor.wordWrapColumn": 80
     }
+  },
+  // Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+  "remoteUser": "node"
 }