devcontainer.json file's customizations of the project override feature's customizations

When there are the same vscode settings in both feature's and the project's devcontainer.json file, the project's customizations override the feature's. Is it possible to merge it instead of an override?

- devcontainer.json file at the **features**:

```json
{
"customizations": {
"vscode": {
"settings": {
"files.associations": {
"LICENSE*": "plaintext"
}
}
}
}
}
```

- devcontainer.json file at the **project**:

```json
{
"customizations": {
"vscode": {
"settings": {
"files.associations": {
"commit-msg-template": "git-commit"
}
}
}
}
}
```

**Expected Result:**

```json
{
"customizations": {
"vscode": {
"settings": {
"files.associations": {
"LICENSE*": "plaintext",
"commit-msg-template": "git-commit"
}
}
}
}
}
```

**Current Result:**

```json
{
"customizations": {
"vscode": {
"settings": {
"files.associations": {
"commit-msg-template": "git-commit"
}
}
}
}
}
```