ci: add Jenkins pipeline

Build and push chat-store image to Harbor on merge to `release` branch.
Image tag derived from job name (deploy-logos-dev, deploy-logos-test).
Watchtower picks up the new tag on the deployed hosts.

ci/Jenkinsfile

@@ -0,0 +1,74 @@
+#!/usr/bin/env groovy
+library 'status-jenkins-lib@v1.9.41'
+
+pipeline {
+  agent {
+    docker {
+      label 'linuxcontainer'
+      image 'harbor.status.im/infra/ci-build-containers:linux-base-1.0.0'
+      args '--volume=/var/run/docker.sock:/var/run/docker.sock ' +
+           '--user jenkins'
+    }
+  }
+
+  options {
+    timestamps()
+    ansiColor('xterm')
+    disableRestartFromStage()
+    timeout(time: 30, unit: 'MINUTES')
+    buildDiscarder(logRotator(
+      numToKeepStr: '10',
+      daysToKeepStr: '30',
+    ))
+  }
+
+  parameters {
+    string(
+      name: 'IMAGE_TAG',
+      description: 'Name of Docker tag to push.',
+      defaultValue: env.JOB_BASE_NAME
+    )
+    string(
+      name: 'IMAGE_NAME',
+      description: 'Name of Docker image to push.',
+      defaultValue: params.IMAGE_NAME ?: 'harbor.status.im/logos-messaging/chat-store',
+    )
+    string(
+      name: 'DOCKER_CRED',
+      description: 'Name of Docker Registry credential.',
+      defaultValue: params.DOCKER_CRED ?: 'harbor-logos-core-private-robot',
+    )
+    string(
+      name: 'DOCKER_REGISTRY_URL',
+      description: 'URL of the Docker Registry',
+      defaultValue: params.DOCKER_REGISTRY_URL ?: 'https://harbor.status.im'
+    )
+  }
+
+  stages {
+    stage('Build') {
+      steps { script {
+        image = docker.build(
+          "${params.IMAGE_NAME}:${params.IMAGE_TAG}",
+          "--label=build='${env.BUILD_URL}' " +
+          "--label=commit='${git.commit()}' " +
+          "."
+        )
+      } }
+    }
+
+    stage('Push') {
+      steps { script {
+        withDockerRegistry([
+          credentialsId: params.DOCKER_CRED, url: params.DOCKER_REGISTRY_URL
+        ]) {
+          image.push()
+        }
+      } }
+    }
+  }
+
+  post {
+    always { sh 'docker image prune -f' }
+  }
+}