Modernize dev environment

.devcontainer/devcontainer.json

@@ -0,0 +1,40 @@
+{
+  "name": "hass-browser_mod Dev",
+  "image": "thomasloven/hass-custom-devcontainer",
+  "postCreateCommand": "sudo -E container setup-dev && npm add",
+  "containerEnv": {
+    "DEVCONTAINER": "1"
+  },
+  "forwardPorts": [8123],
+  "mounts": [
+    "source=${localWorkspaceFolder},target=/config/www/workspace,type=bind",
+    "source=${localWorkspaceFolder}/test,target=/config/test,type=bind",
+    "source=${localWorkspaceFolder}/test/configuration.yaml,target=/config/configuration.yaml,type=bind",
+    "source=${localWorkspaceFolder}/custom_components,target=/config/custom_components,type=bind"
+  ],
+  "runArgs": ["--env-file", "${localWorkspaceFolder}/test/.env"],
+  "extensions": [
+    "github.vscode-pull-request-github",
+    "esbenp.prettier-vscode",
+    "spmeesseman.vscode-taskexplorer",
+    "ms-python.python"
+  ],
+  "settings": {
+    "files.eol": "\n",
+    "editor.tabSize": 2,
+    "editor.formatOnPaste": false,
+    "editor.formatOnSave": true,
+    "editor.formatOnType": true,
+    "[javascript]": {
+      "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "[typescript]": {
+      "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "files.trimTrailingWhitespace": true,
+    "python.linting.pylintEnabled": false,
+    "python.linting.flake8Enabled": true,
+    "python.linting.enabled": true,
+    "python.formatting.provider": "black"
+  }
+}