docs(ci): adds integration information with travis, circle & gitlab ci

docs(ci): corrects spells

docs/ci.md

@@ -0,0 +1,14 @@
+---
+id: ci
+title: "Continuous Integration"
+---
+
+You may use verdaccio with continuous integration while login or publish. When 
+using NPM to install a private module in a continuous integration environment 
+for the first time, a brick wall is quickly hit. The NPM login command is 
+designed to be used interactively. This causes an issue in CI, scripts, etc. 
+Here’s how to use NPM login different continuous integration platforms.
+
+- [Travis CI](https://remysharp.com/2015/10/26/using-travis-with-private-npm-deps)
+- [Circle CI 1.0](https://circleci.com/docs/1.0/npm-login/)
+- [Gitlab CI](https://www.exclamationlabs.com/blog/continuous-deployment-to-npm-using-gitlab-ci/)

website/sidebars.json

@@ -28,7 +28,8 @@
     "DevOps": [
       "docker",
       "kubernetes",
-      "ansible"
+      "ansible",
+      "ci"
     ],
     "Development": [
       "build",