Fix installation problem for sharp

[Greenheart]

Related bug:

npm/cli#4828

Error: Could not load the "sharp" module using the linux-x64 runtime
Possible solutions:

• Ensure optional dependencies can be installed:
  npm install --include=optional sharp
• Ensure your package manager supports multi-platform installation:
  See https://sharp.pixelplumbing.com/install#cross-platform
• Add platform-specific dependencies:
  npm install --os=linux --cpu=x64 sharp
• Consult the installation documentation:
  See https://sharp.pixelplumbing.com/install