Use NEXUS_NPM_CONFIG env var for publishing in gitlab ci.

.gitlab-ci.yml

@@ -5,15 +5,15 @@ stages:
 variables:
   GIT_SUBMODULE_STRATEGY: recursive
 
+before_script:
+  - echo $NEXUS_NPM_CONFIG | tr ' ' '\n' > ~/.npmrc
+
 test:
   stage: test
   except:
     - tags
   image: node:8-alpine
   script:
-    - echo $NEXUS_NPM_TOKEN > ~/.npmrc
-    - echo 'always-auth=true' >> ~/.npmrc
-    - npm set @nsd:registry https://nexus.nsd.no/repository/npm-group/
     - npm install
     - npm run build
 
@@ -23,9 +23,6 @@ publish:
     - tags
   image: node:8-alpine
   script:
-    - echo $NEXUS_NPM_TOKEN > ~/.npmrc
-    - echo 'always-auth=true' >> ~/.npmrc
-    - npm set @nsd:registry https://nexus.nsd.no/repository/npm-group/
     - npm install
     - npm run build
     - echo $NEXUS_NPM_PUB_TOKEN > ~/.npmrc