Create workflow to upload image to docker hub

.github/workflows/publish-docker-image.yml

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+name: Publish Docker Image
+
+on:
+  workflow_dispatch:
+  push:
+    paths:
+      - 'requirements.txt'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out the repository
+      uses: actions/checkout@v2
+
+    - name: Log in to DockerHub
+      uses: docker/login-action@v2
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
+    - name: Build the Docker image
+      run: docker build -t ${{ secrets.DOCKER_USERNAME }}/test-workflows .
+
+    - name: Push the Docker image
+      run: docker push ${{ secrets.DOCKER_USERNAME }}/test-workflows:latest

DockerFile

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+FROM ubuntu:latest as base
+
+RUN apt-get update && apt-get install -y \
+    python3 \
+    python3-pip \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN pip3 install --upgrade pip
+
+COPY requirements.txt /app/requirements.txt
+
+RUN pip3 install -r /app/requirements.txt