Update devcontainer file (#103)

.devcontainer/Dockerfile

@@ -3,7 +3,12 @@ FROM ghcr.io/home-assistant/devcontainer:addons
 RUN \
   apt-get update \
   && apt-get install -y --no-install-recommends \
-    python3-pip
+    python3-pip \
+    python3-venv
+
+ENV VIRTUAL_ENV=/opt/venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
 
 COPY script/requirements.txt /
 

.devcontainer/devcontainer.json

@@ -14,23 +14,28 @@
   "containerEnv": {
     "WORKSPACE_DIRECTORY": "${containerWorkspaceFolder}"
   },
-  "extensions": [
-    "timonwong.shellcheck",
-    "esbenp.prettier-vscode"
-  ],
-  "mounts": [
-    "type=volume,target=/var/lib/docker"
-  ],
-  "settings": {
-    "terminal.integrated.profiles.linux": {
-      "zsh": {
-        "path": "/usr/bin/zsh"
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "timonwong.shellcheck",
+        "esbenp.prettier-vscode",
+        "ms-python.python"
+      ],
+      "mounts": [
+        "type=volume,target=/var/lib/docker"
+      ],
+      "settings": {
+        "terminal.integrated.profiles.linux": {
+          "zsh": {
+            "path": "/usr/bin/zsh"
+          }
+        },
+        "terminal.integrated.defaultProfile.linux": "zsh",
+        "editor.formatOnPaste": false,
+        "editor.formatOnSave": true,
+        "editor.formatOnType": true,
+        "files.trimTrailingWhitespace": true
       }
-    },
-    "terminal.integrated.defaultProfile.linux": "zsh",
-    "editor.formatOnPaste": false,
-    "editor.formatOnSave": true,
-    "editor.formatOnType": true,
-    "files.trimTrailingWhitespace": true
+    }
   }
 }