update dockerfile

(cherry picked from commit 18d6132593145c031902c3a1b73bb7f1f8ccb89b)

# Conflicts:
#	build/ci/Dockerfile

build/ci/Dockerfile

@@ -0,0 +1,15 @@
+FROM ubuntu:16.04
+MAINTAINER Antergos Developers <dev@antergos.com>
+
+RUN DEBIAN_FRONTEND=noninteractive apt-get update; \
+	apt-get install -y \
+		libgtk-3-dev \
+		liblightdm-gobject-1-dev \
+		libexo-1-dev \
+		exo-utils \
+		libdbus-glib-1-dev \
+		gnome-common \
+		libwebkit2gtk-4.0-dev
+
+VOLUME /build
+WORKDIR /build