setup pwa capabilities and favicons PR (#10)

[LemmyMwaura]

Description

Added PWA capabilities to the app and setup dynamic favicons (depends on screen size)(#10)

Type of change

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)

Npm Peer Dependency Conflict

• angular/service-worker installation had some peer dependency conflicts with a few angular packages e.g angular/common. To fix the installation, I had to ignore peer dependencies by adding --legacy-peer-deps flags to the installation command
• This will therefore be a requirement for all future installs.
  • npm install @angular/service-worker --legacy-peer-deps
• Everything else works as expected

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code