1. Example: section of angular.json .js

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "your-project-name": {
      ...,
      "architect": {
        "build": {
          // copy this part
        },
        "augury": { // add this section
          // past there
        },
        ...,
      },
      ...,
    },
    ...,
  },
  ...,
}

2. Example: change build options under angular.json .js

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "example-project-name": {
      ...,
      "architect": {
        "build": {
          ..., // DO NOT make any change for this section, just keep it as original.
        },
        "augury": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            ...,
            "tsConfig": "tsconfig.augury.json",
            "aot": false,
            ...
          },
          ...
        },
        "serve": {
          ...,
          "configurations": {
            ...,
            "augury": { // add this section
              "browserTarget": "your-project-name:augury"
            }
          }
        },
        ...,
      },
      ...,
    },
    ...,
  },
  ...,
}