Fix process is not defined issue

[floydnant]

Occurrences

• [Runtime error] when running component tests which depend on files that import the environment-info.ts
• [Type error] when building the app

Potential solutions

• [Runtime error] replacing the problematic file with one that doesn't throw, leveraging Angular's fileReplacement mechanism

• [Type error] can be suppressed just by adding env.d.ts with

  // eslint-disable-next-line no-var
  declare var process: {
      env: Record<string, string>
  }