Create Dockerhub deployment (#7)

.github/workflows/deploy.yml

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+name: Docker deployment
+
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    name: Push Docker images
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+      - name: Push Docker Hub
+        uses: docker/build-push-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+          repository: loscrackitos/transport-api
+          tags: latest
+          tag_with_ref: true
+          push: ${{ startsWith(github.ref, 'refs/tags/') }}

Dockerfile

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+FROM python:3.7-alpine
+WORKDIR /api
+ENV FLASK_APP api.py
+ENV FLASK_RUN_HOST 0.0.0.0
+RUN apk add --no-cache git tk-dev gcc musl-dev linux-headers
+COPY requirements.txt requirements.txt
+RUN pip install -r requirements.txt
+EXPOSE 5000
+COPY . .
+CMD ["flask", "run"]