[DS-3968] move dockerfile into codebase

Dynamic forms Components

Pipeable operators

# Conflicts:
#	resources/i18n/en.json
#	src/app/core/cache/response-cache.models.ts
#	src/app/core/data/request.models.ts
#	src/app/shared/shared.module.ts
#	src/styles/_custom_variables.scss

Fix truncated text being difficult to select

Related to Google Chrome browser

Merge pull request #246 from Atmire-Kristof/w2p-50632_Replace-mock-registry-service-with-implementation

Admin Registry pages and service

Conflicts:
	src/app/core/data/request.effects.ts

Merge remote-tracking branch 'dspace/master' into w2p-50632_Replace-mock-registry-service-with-implementation

Conflicts:
	src/app/app-routing.module.ts
	src/app/core/cache/response-cache.models.ts

Authentication

Created custom sass variable
Removed use of instanceof operator