Completed the CI/CD workflow and flask app

Author: Irene Busah

.github/workflows/cicd.yml

@@ -0,0 +1,58 @@
+name: CI/CD for Dockerized Flask APP
+
+on:
+    push:
+        branches: [main]
+    pull_request: 
+        branches: [main]
+
+jobs:
+    build-and-test:
+        runs-on: ubuntu-latest
+
+        steps:
+        -   name: Checkout code
+            uses: actions/checkout@v3
+
+        -   name: Set up Python
+            uses: actions/setup-python@v4
+            with:
+                python-version: '3.13.5'
+
+        -   name: Install dependencies
+            run: 
+                python -m pip install --upgrade pip
+                pip install flask
+                pip install pytest
+        
+        -   name: Run tests
+            run:
+                pytest
+    
+    build-and-publish:
+        needs: build-and-test
+        runs-on: ubuntu-latest
+
+        steps:
+        -   name: Checkout code
+            uses: actions/checkout@v3
+        
+        -   name: Set up Docker Buildx
+            uses: docker/setup-buildx-action@v2
+        
+        -   name: Login to DockerHub
+            uses: docker/login-action@v2
+            with:
+                username: ${{secrets.DOCKER_USERNAME}}
+                password: ${{secrets.DOCKER_PASSWORD}}
+        
+        -   name: Build and push Docker image
+            uses: docker/build-push-action@v4
+            with:
+                context: .
+                push: true
+                tags: ${{ secrets.DOCKER_USERNAME }}/flask-app:latest
+        
+        -   name: Image digest
+            run: echo ${{ steps.build-and-publish.outputs.digest }}
+

Dockerfile

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+FROM python:3.9-slim
+
+# setting the working directory
+WORKDIR /app
+
+# copying the current directory into the container
+COPY . /app
+
+# installing the flask
+RUN pip install flask
+
+# exposing the PORT
+EXPOSE 5000
+
+# running the app
+CMD [ "python", "app.py" ]

app.py

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+from flask import Flask
+
+# creating the flask app
+app = Flask(__name__)
+
+@app.route("/")
+def home():
+    return "Hello World!"
+
+
+if __name__ == '__main__':
+    app.run(host='localhost', port=5000, debug=True)

test_app.py

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+from app import app
+
+# defining the test function
+def test_home():
+    response = app.test_client().get("/")
+
+    assert response.status_code==200
+    assert response.data==b"Hello World!"