Add Jenkins controller setup lab (#21)

labs/jenkins-setup/README.md

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+# Jenkins setup lab
+
+## 1. Labs stack
+
+- 1 Jenkins controller
+- 1 Jenkins agent
+
+## 2. Setup
+
+### Prerequisites
+
+- Docker + Docker Compose
+
+### Build and run the containers
+
+```bash
+cd labs/jenkins-setup
+docker-compose up --build -d
+
+# To stop and remove contaienr, run:
+docker compose down
+```
+
+## 3. Explore the Jenkins
+
+- Visit http://localhost:8080/ to explore and use Jenkins
+- Get the init password to login (Login admin/initialAdminPassword):
+
+```bash
+docker exec jenkins-controller cat /var/jenkins_home/secrets/initialAdminPassword
+
+# 1d86cf0e5fe14608970274adb54ec3ac
+```

labs/jenkins-setup/docker-compose.yaml

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+version: '3.8'
+
+services:
+  jenkins-controller:
+    build:
+      context: ../../pools/jenkins/jenkins-controller
+    container_name: jenkins-controller
+    ports:
+      - '8080:8080'
+      - '50000:50000'
+    volumes:
+      - jenkins_data:/var/jenkins_home
+    networks:
+      - jenkins-network
+
+volumes:
+  jenkins_data:
+
+networks:
+  jenkins-network:
+    driver: bridge

pools/jenkins/jenkins-controller/Dockerfile

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+FROM jenkins/jenkins:lts
+
+# Install plugins
+COPY plugins.txt /usr/share/jenkins/ref/plugins.txt
+RUN jenkins-plugin-cli --plugin-file /usr/share/jenkins/ref/plugins.txt

pools/jenkins/jenkins-controller/plugins.txt

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+git:5.2.2
+blueocean:1.27.14