add Jenkinsfile for Docker image CI builds

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

Jenkinsfile

@@ -0,0 +1,53 @@
+pipeline {
+  agent { label 'linux' }
+
+  parameters {
+    booleanParam(
+      name: 'DEPLOY',
+      description: 'Enable to deploye the Docker image.',
+      defaultValue: false,
+    )
+  }
+
+  options {
+    timestamps()
+    disableConcurrentBuilds()
+    /* manage how many builds we keep */
+    buildDiscarder(logRotator(
+      numToKeepStr: '10',
+      daysToKeepStr: '30',
+    ))
+  }
+
+  environment {
+    IMAGE_NAME = "statusteam/telemetry"
+    IMAGE_DEFAULT_TAG = "${env.GIT_COMMIT.take(7)}"
+    IMAGE_DEPLOY_TAG = "deploy"
+  }
+
+  stages {
+    stage('Build') { steps { script {
+      image = docker.build(
+        "${env.IMAGE_NAME}:${env.IMAGE_DEFAULT_TAG}"
+      )
+    } } }
+
+    stage('Push') { steps { script {
+      withDockerRegistry([
+        credentialsId: "dockerhub-statusteam-auto"
+      ]) {
+        image.push()
+      }
+    } } }
+
+    stage('Deploy') {
+      when { expression { params.DEPLOY } }
+      steps { script {
+        withDockerRegistry([
+          credentialsId: "dockerhub-statusteam-auto"
+        ]) {
+          image.push(env.IMAGE_DEPLOY_TAG)
+        }
+    } } }
+  } // stages
+} // pipeline