closes #172

subato-web/angular.json

subato-web/src/app/app.component.scss

...eb/src/app/layout/components/header/header.component.html

...-web/src/app/layout/components/header/header.component.ts

subato-web/src/app/layout/layout.module.ts

subato-web/src/app/layout/store/layout.effects.ts

...o-web/src/app/layout/styles/partials/_global-spinner.scss

subato-web/src/app/layout/styles/styles.scss

subato-web/src/app/layout/styles/themes.scss

subato-web/src/assets/images/test/logo.png

subato-web/src/assets/images/test/logo_dark.png

subato-web/src/assets/images/test/logo_small.png

subato-web/src/assets/images/test/logo_small_dark.png

subato-web/src/environments/environment.prod.ts

subato-web/src/environments/environment.test.ts

subato-web/src/environments/environment.ts

subato-web/src/index.html

subato-web/src/index.prod.html

.../subato/shared/error/rendering/HtmlExceptionRenderer.java

subato/src/main/resources/templates/error.html