Dockerfile: Allow one to pass a npmrc file

awx/ui/test/e2e/cluster/Dockerfile

@@ -1,5 +1,8 @@
 FROM centos:7
 
+ARG NPMRC_FILE=awx/ui/.npmrc
+ENV NPMRC_FILE=${NPMRC_FILE}
+
 RUN yum -y update && yum -y install epel-release && yum -y install https://centos7.iuscommunity.org/ius-release.rpm
 
 RUN yum install -y \
@@ -15,7 +18,9 @@ WORKDIR /awx
 
 COPY awx/ui/package.json awx/ui/package.json
 
-RUN npm --prefix=awx/ui install
+COPY ${NPMRC_FILE} awx/ui/.npmrc
+
+RUN npm --prefix=awx/ui config list && npm --prefix=awx/ui install
 
 COPY awx/ui/test/e2e awx/ui/test/e2e
 

awx/ui/test/e2e/cluster/docker-compose.yml

@@ -39,3 +39,4 @@ services:
       AWX_E2E_CLUSTER_HOST: hub
       AWX_E2E_CLUSTER_PORT: 4444
       DBUS_SESSION_BUS_ADDRESS: /dev/null
+      NPMRC_FILE: ${NPMRC_FILE}