add Jenkinsfile for CI builds

Signed-off-by: Jakub Sokołowski <jakub@status.im>

Jenkinsfile

@@ -0,0 +1,50 @@
+pipeline {
+  agent { label 'linux' }
+
+  options {
+    disableConcurrentBuilds()
+    /* manage how many builds we keep */
+    buildDiscarder(logRotator(
+      numToKeepStr: '20',
+      daysToKeepStr: '30',
+    ))
+  }
+
+  environment {
+    GIT_COMMITTER_NAME = 'status-im-auto'
+    GIT_COMMITTER_EMAIL = 'auto@status.im'
+    /* dev page settings */
+    DEV_SITE = 'dev-docs.dappconnect.dev'
+    DEV_HOST = 'jenkins@node-01.do-ams3.sites.misc.statusim.net'
+    SCP_OPTS = 'StrictHostKeyChecking=no'
+  }
+
+  stages {
+    stage('Build') {
+      steps {
+        sh 'mdbook build'
+      }
+    }
+
+    stage('Publish Prod') {
+      when { expression { env.GIT_BRANCH ==~ /.*master/ } }
+      steps {
+        sshagent(credentials: ['status-im-auto-ssh']) {
+          sh "ghp-import -p book"
+        }
+      }
+    }
+
+    stage('Publish Devel') {
+      when { expression { env.GIT_BRANCH ==~ /.*develop/ } }
+      steps {
+        sshagent(credentials: ['jenkins-ssh']) {
+          sh """
+            rsync -e 'ssh -o ${SCP_OPTS}' -r --delete book/. \
+              ${env.DEV_HOST}:/var/www/${env.DEV_SITE}/
+          """
+        }
+      }
+    }
+  }
+}

README.md

@@ -16,4 +16,9 @@ Will expose the built page under http://localhost:3000/.
 
 # Continuous Integration
 
-__TODO__
+Two branches are built by [our Jenkins instance](https://ci.status.im/):
+
+* `master` is deployed to https://docs.dappconnect.dev/ by [CI](https://ci.status.im/job/website/job/docs.dappconnect.dev/)
+* `develop` is deployed to https://dev-docs.dappconnect.dev/ by [CI](https://ci.status.im/job/website/job/dev-docs.dappconnect.dev/)
+
+PRs should be made for `develop` branch and `master` should be [rebased](https://git-scm.com/book/en/v2/Git-Branching-Rebasing) on `develop` once changes are verified.