Build Docker image on release (#123)

.github/workflows/docker.yml

@@ -0,0 +1,14 @@
+name: docker
+
+on: [push, workflow_dispatch]
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Build Docker image
+        run: sudo docker build .
+        working-directory: backend

.github/workflows/publish_docker_image.yml

@@ -0,0 +1,42 @@
+name: Create and publish a Docker image
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

backend/Dockerfile

@@ -1,18 +1,17 @@
-FROM ubuntu:22.04
+FROM python:3.10-alpine3.17
+ARG packages
+RUN apk --update add ${packages} \
+    && rm -rf /var/cache/apk/* \
+    && pip3 install --upgrade pip pipenv wheel virtualenv
 
-RUN apt-get update -y && \
-    apt-get upgrade -y && \
-    apt-get install -y python3 python3-pip
+COPY . /app
+WORKDIR /app
 
-RUN useradd -ms /bin/bash bracket
-WORKDIR /home/bracket/backend
-
-COPY . /home/bracket/backend
-RUN chown -R bracket:bracket /home/bracket
+# -- Install dependencies:
+RUN addgroup -S bracket && adduser -S bracket -G bracket \
+    && chown -R bracket:bracket /app
 USER bracket
-ENV PATH="${PATH}:/home/bracket/.local/bin"
 
-# Install backend
-RUN python3 -m pip install --upgrade pipenv wheel virtualenv
-RUN pipenv install -d
-RUN pipenv run mypy .
+RUN set -ex \
+    && pip3 install --upgrade pip pipenv wheel virtualenv \
+    && pipenv install --deploy