Initial commit for Postgres Operator UI (#613)

* Initial commit for our basic Postgres Operator UI:
 * Create and modify Postgres manifests
 * Watch Operator Logs in the UI
 * Observe cluster creation progress
 * S3 Backup browser for clone and restore

Many thanks to Manuel Gomez and Jan Mussler for the initial UI work a long time ago!

ui/Makefile

@@ -0,0 +1,43 @@
+.PHONY: clean test appjs docker push mock
+
+BINARY ?= postgres-operator-ui
+BUILD_FLAGS ?= -v
+CGO_ENABLED ?= 0
+ifeq ($(RACE),1)
+	BUILD_FLAGS += -race -a
+    CGO_ENABLED=1
+endif
+
+LOCAL_BUILD_FLAGS ?= $(BUILD_FLAGS)
+LDFLAGS ?= -X=main.version=$(VERSION)
+DOCKERDIR = docker
+
+IMAGE            ?= registry.opensource.zalan.do/acid/$(BINARY)
+VERSION          ?= $(shell git describe --tags --always --dirty)
+TAG              ?= $(VERSION)
+GITHEAD          = $(shell git rev-parse --short HEAD)
+GITURL           = $(shell git config --get remote.origin.url)
+GITSTATU         = $(shell git status --porcelain || echo 'no changes')
+TTYFLAGS         = $(shell test -t 0 && echo '-it')
+
+default: docker
+
+clean:
+	rm -fr operator_ui/static/build
+
+test:
+	tox
+
+appjs:
+	docker run $(TTYFLAGS) -u $$(id -u) -v $$(pwd):/workdir -w /workdir/app node:10.1.0-alpine npm install
+	docker run $(TTYFLAGS) -u $$(id -u) -v $$(pwd):/workdir -w /workdir/app node:10.1.0-alpine npm run build
+
+docker: appjs
+	docker build --build-arg "VERSION=$(VERSION)" -t "$(IMAGE):$(TAG)" .
+	@echo 'Docker image $(IMAGE):$(TAG) can now be used.'
+
+push: docker
+	docker push "$(IMAGE):$(TAG)"
+
+mock:
+	docker run -it -p 8080:8080 "$(IMAGE):$(TAG)" --mock