Create testing suite

[ziyi01]

Tests:

• [x] Check db connection
• [x] Check if app.tsx is displayed
• [x] Check if /api exists
• [ ] Check if client-host connects (render client-host pages)

Update workflow and add unit tests for each component if possible

[ziyi01]

Connected to #1

[ziyi01]

I'll come back to this if I have time with sockets.