Replace TravisCI with GitLab CI (#16)

* Add gitlab-ci configuration

* Attempt to fix cypress binary installation cache

* Even more improve caching, add wait-on step to ensure, that web server is ready to run cypress

* Exclude cache directory from linting

* Do not cache yarn's global cache to reduce the size of the cache to upload

* Disable Sentry for e2e tests, enable parallelization for cypress

* Store build artifacts

* Add dev deployment stage

* Try to fix commits association

* Fix sentry-cli param name

* Disable host checking for rsync

* Disable host checking via ssh config

* Add production deployment step

* Fix deployment Sentry notifying, allow performing auto deployment with special commit message

* Make autodeploy [deploy]

* Cleanup test branch refs

* Remove environment definition. Detect it based on the domain name

* Store cache for E2E tests separately

config.js

@@ -6,7 +6,6 @@ const { env } = process;
 
 module.exports = {
   version: env.VERSION || env.NODE_ENV,
-  environment: env.ENVIRONMENT || env.NODE_ENV,
   apiHost: env.API_HOST || 'https://dev.account.ely.by',
   ga: env.GA_ID && { id: env.GA_ID },
   sentryDSN: env.SENTRY_DSN,