1. Improving
1.1 map improvement [Caesar]
1.2 layout improvement (add a new tab for distribution & scatter plot) [Caesar]
1.3 download button (e.g. filtered dataset) [Yurui]
1.4 make the bar plot reactive [Flora]
1.5 reactive selection on continent & country [Nikita]
2. Reproducibility
2.1 Testthat [Nikita]
2.2 github action & deployment on Shinyapp.io
3. Production ready app
3.1 double check if the app is working properly
3.2 Improve the user feedback (Add progress bars / spinners)
3.3 readme.md [Yurui]