Add Network Graph page
This MR solves #1 (closed).
This MR also enables GitLab Pages features:
- Statistik harian dashboard: https://kawalcovid19.gitlab.io/kawal-covid-19-analytics/viz_gallery/statistik_harian.html
- (NEW - This MR) Network graph: https://kawalcovid19.gitlab.io/kawal-covid-19-analytics/viz_gallery/network.html
About Network Graph page:
- It uses https://kawalcovid19-pasien.herokuapp.com APIs (https://kawalcovid19-pasien.herokuapp.com/patients and https://kawalcovid19-pasien.herokuapp.com/clusters) due to limitation of https://kawalcovid19.harippe.id/api/raw (no relation between patients and clusters). But I refer to https://kcov.id/daftarpositif as source of truth.
- The Patients and Clusters API is built using strapi -- https://github.com/strapi/strapi, hosted in my Heroku.
- It uses https://github.com/visjs/vis-network
- It still MVP, open for feedback