Jenkins declarative multibranch CI pipeline (#202)
Jenkins declarative multibranch CI pipeline (#202)

* Added `Jenkinsfile`

* Removed empty `post` from `Jenkinsfile`

* Added `tools` to Jenkinsfile to make Node available to the pipeline steps

* Cleanup.

* Testing email sending in `post`.

* Testing email sending in `post`.

* Testing branch name conditionals in `post`.

* Final PR-eligible version of the Jenkinsfile
FDA/open.fda.gov,FDA/open.fda.gov