added chart for players progress along with som small css changes

client/package-lock.json

client/package.json

client/src/app/add-post/add-post.component.ts

client/src/app/add-post/add-post.service.ts

client/src/app/app.module.ts

client/src/app/graph/graph.component.css

client/src/app/graph/graph.component.html

client/src/app/graph/graph.component.ts

client/src/app/graph/graph.service.ts

client/src/app/home/home.component.css

client/src/app/models/post.model.ts

client/src/app/show-post/show-post.component.css

client/src/app/show-post/show-post.component.html

server/app.js

server/model/post.js