Merge branch '3-frontend-annonser-form' into 'master'

client/package.json

client/proxy.conf.json

client/src/app/app-routing.module.ts

client/src/app/app.module.ts

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

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

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

client/src/app/posts/post-form/post-form.component.html

client/src/app/posts/post-form/post-form.component.spec.ts

client/src/app/posts/post-form/post-form.component.ts

client/src/app/posts/post.module.ts

client/src/app/posts/post.service.spec.ts

client/src/app/posts/post.service.ts

client/src/app/shared/button/button.component.html

client/src/app/shared/button/button.component.scss

client/src/app/shared/button/button.component.spec.ts

client/src/app/shared/button/button.component.ts

...t/src/app/shared/number-input/number-input.component.html

...t/src/app/shared/number-input/number-input.component.scss

...rc/app/shared/number-input/number-input.component.spec.ts