Chore/create/ansible playbook

.github/workflows/learn-github-actions.yml

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+name: learn-github-actions
+run-name: ${{ github.actor }} is learning GitHub Actions
+on: [push]
+jobs:
+  check-bats-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - run: npm install -g bats
+      - run: bats -v

Dockerfile

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+FROM ubuntu:22.04
+
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+      python3 python3-pip \
+ && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt /tmp/requirements.txt
+RUN pip install --upgrade pip \
+ && pip install --no-cache-dir -r /tmp/requirements.txt
+
+COPY /app /app
+WORKDIR /app
+
+RUN useradd appuser \
+ && chown -R appuser:appuser /app
+USER appuser
+
+CMD ["python3", "app.py"]

M1-3-Ansible/build-and-run.yml

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+---
+- name: Build/push/run locally
+  hosts: localhost
+  connection: local
+  gather_facts: false
+
+  vars:
+    image_name: devops-programme
+    image_tag: v2
+    container_name: devops-programme-container
+    container_port: 3000
+    listen_port: 3000
+    app_dir: "{{ (playbook_dir + '/..') | realpath }}"
+    dockerfile_relpath: "Dockerfile"
+
+  tasks:
+
+    - name: Compose image ref and Dockerfile absolute path
+      ansible.builtin.set_fact:
+        registry_image: "localhost:5000/{{ image_name }}:{{ image_tag }}"
+        dockerfile_fullpath: "{{ app_dir }}/{{ dockerfile_relpath }}"
+
+    - name: Verify Dockerfile exists at repo root
+      ansible.builtin.stat:
+        path: "{{ dockerfile_fullpath }}"
+      register: dockerfile_stat
+
+    - name: Fail if Dockerfile is missing
+      ansible.builtin.fail:
+        msg: "Dockerfile not found at {{ dockerfile_fullpath }}. Check app_dir/dockerfile_relpath."
+      when: not dockerfile_stat.stat.exists
+
+    - name: Build image from repo root
+      community.docker.docker_image:
+        name: "{{ registry_image }}"
+        source: build
+        build:
+          path: "{{ app_dir }}"                 
+          dockerfile: "{{ dockerfile_relpath }}"
+          pull: true
+        push: false
+
+    - name: Run (or update) container from local registry
+      community.docker.docker_container:
+        name: "{{ container_name }}"
+        image: "{{ registry_image }}"
+        state: started
+        recreate: true
+        restart_policy: unless-stopped
+        published_ports:
+          - "{{ listen_port | int }}:{{ container_port | int }}"
+        env:
+          PORT: "{{ listen_port | string }}"

M1-3-Ansible/pull-and-start.yml

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+---
+- name: Deploy Docker image
+  hosts: localhost
+  vars:
+    image_name: devops-programme
+    image_tag: v1
+    listen_port: 3000
+  tasks:
+  - name: Pull Docker Image
+    docker_image:
+      name: "{{ image_name }}"
+      source: pull
+      tag: "{{ image_tag }}"
+  - name: Start Docker container
+    docker_container:
+      name: "{{ image_name }}"
+      image: "{{ image_name }}"
+      ports:
+      - "{{ listen_port | int }}:{{ listen_port | int }}"
+      state: started

requirements.txt

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+flask==3.0.0 ; python_version >= "3.10" and python_version < "4.0"
+itsdangerous==2.1.2 ; python_version >= "3.10" and python_version < "4.0"
+jinja2==3.1.2 ; python_version >= "3.10" and python_version < "4.0"
+markupsafe==2.1.3 ; python_version >= "3.10" and python_version < "4.0"
+werkzeug==3.0.0 ; python_version >= "3.10" and python_version < "4.0"