ci: Begin Jenkins build pipeline

ci/Jenkinsfile

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+// vim: set sw=4 ts=4 sts=4 et :
+// vim: set ft=groovy :
+
+pipeline {
+    agent {
+        kubernetes {
+            yamlFile 'ci/podTemplate.yaml'
+        }
+    }
+
+    stages {
+        stage('Build Backend') {
+            steps {
+                container('python') {
+                    dir('svc') {
+                        sh '. ../ci/build-svc.sh'
+                    }
+                }
+            }
+        }
+    }
+
+}

ci/build-svc.sh

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+#!/bin/sh -ex
+
+python -m venv .venv
+.venv/bin/python -m pip install -U pip setuptools wheel
+.venv/bin/python -m pip install poetry
+
+.venv/bin/poetry build

ci/podTemplate.yaml

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+spec:
+  containers:
+  - name: python
+    image: docker.io/python:3.10
+    command:
+    - sleep
+    - infinity