Add Dockerfile and workflow for course discovery

.github/workflows/push-course-discovery-image.yaml

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+name: Build and Push Course Discovery Image
+
+on:
+  workflow_dispatch:
+    inputs:
+      branch:
+        description: "Target branch from which the source dockerfile from image will be sourced"
+
+  schedule:
+    - cron: "0 4 * * 1-5"  # UTC Time
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Get tag name
+        id: get-tag-name
+        uses: actions/github-script@v5
+        with:
+          script: |
+            const tagName = "${{ github.event.inputs.branch }}" || 'latest';
+            return tagName;
+          result-encoding: string
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+      - name: Build and push Dev Docker image
+        uses: docker/build-push-action@v6
+        with:
+          file: ./dockerfiles/course-discovery.Dockerfile
+          push: true
+          target: dev
+          tags: edxops/discovery-dev:${{ steps.get-tag-name.outputs.result }}
+
+      - name: Send failure notification
+        if: failure()
+        uses: dawidd6/action-send-mail@v3
+        with:
+          server_address: email-smtp.us-east-1.amazonaws.com
+          server_port: 465
+          username: ${{secrets.edx_smtp_username}}
+          password: ${{secrets.edx_smtp_password}}
+          subject: Push Image to docker.io/edxops failed in Course Discovery
+          to: [email protected]
+          from: github-actions <[email protected]>
+          body: Push Image to docker.io/edxops for Course Discovery failed! For details see "github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"

dockerfiles/course-discovery.Dockerfile

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+FROM ubuntu:focal as app
+
+ARG PYTHON_VERSION=3.12
+
+ENV DEBIAN_FRONTEND noninteractive
+ENV TZ=UTC
+
+# System requirements.
+RUN apt-get update && \
+  apt-get install -y software-properties-common && \
+  apt-add-repository -y ppa:deadsnakes/ppa && \
+  apt-get install -qy \
+  curl \
+  gettext \
+  # required by bower installer
+  git \
+  language-pack-en \
+  build-essential \
+  libmysqlclient-dev \
+  libssl-dev \
+  # TODO: Current version of Pillow (9.5.0) doesn't provide pre-built wheel for python 3.12,
+  # So this apt package is needed for building Pillow on 3.12,
+  # and can be removed when version of Pillow is upgraded to 10.5.0+
+  libjpeg-dev \
+  # mysqlclient >= 2.2.0 requires pkg-config.
+  pkg-config \
+  libcairo2-dev \
+  python3-pip \
+  python${PYTHON_VERSION} \
+  python${PYTHON_VERSION}-dev \
+  python${PYTHON_VERSION}-distutils && \
+  rm -rf /var/lib/apt/lists/*
+
+# Use UTF-8.
+RUN locale-gen en_US.UTF-8
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US:en
+ENV LC_ALL en_US.UTF-8
+
+ARG COMMON_APP_DIR="/edx/app"
+ARG COMMON_CFG_DIR="/edx/etc"
+ARG DISCOVERY_SERVICE_NAME="discovery"
+ARG DISCOVERY_APP_DIR="${COMMON_APP_DIR}/${DISCOVERY_SERVICE_NAME}"
+ARG DISCOVERY_VENV_DIR="${COMMON_APP_DIR}/${DISCOVERY_SERVICE_NAME}/venvs/${DISCOVERY_SERVICE_NAME}"
+ARG DISCOVERY_CODE_DIR="${DISCOVERY_APP_DIR}/${DISCOVERY_SERVICE_NAME}"
+ARG DISCOVERY_NODEENV_DIR="${DISCOVERY_APP_DIR}/nodeenvs/${DISCOVERY_SERVICE_NAME}"
+
+ENV PATH "${DISCOVERY_VENV_DIR}/bin:${DISCOVERY_NODEENV_DIR}/bin:$PATH"
+ENV DISCOVERY_CFG "/edx/etc/discovery.yml"
+ENV DISCOVERY_CODE_DIR "${DISCOVERY_CODE_DIR}"
+ENV DISCOVERY_APP_DIR "${DISCOVERY_APP_DIR}"
+ENV PYTHON_VERSION "${PYTHON_VERSION}"
+
+# Setup zoneinfo for Python 3.12
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+RUN curl -sS https://bootstrap.pypa.io/get-pip.py | python${PYTHON_VERSION}
+RUN pip install virtualenv
+
+RUN virtualenv -p python${PYTHON_VERSION} --always-copy ${DISCOVERY_VENV_DIR}
+
+# No need to activate discovery venv as it is already in path
+RUN pip install nodeenv
+
+RUN nodeenv ${DISCOVERY_NODEENV_DIR} --node=16.14.0 --prebuilt && npm install -g [email protected]
+
+# Working directory will be root of repo.
+WORKDIR ${DISCOVERY_CODE_DIR}
+
+# Cloning git repo
+RUN curl -L https://github.com/openedx/course-discovery/archive/refs/heads/master.tar.gz | tar -xz --strip-components=1
+
+RUN npm install --production && ./node_modules/.bin/bower install --allow-root --production && ./node_modules/.bin/webpack --config webpack.config.js --progress
+
+# Expose canonical Discovery port
+EXPOSE 8381
+
+FROM app as prod
+
+ENV DJANGO_SETTINGS_MODULE "course_discovery.settings.production"
+
+RUN pip install -r ${DISCOVERY_CODE_DIR}/requirements/production.txt
+
+RUN DISCOVERY_CFG=minimal.yml OPENEDX_ATLAS_PULL=true make pull_translations
+
+CMD gunicorn --bind=0.0.0.0:8381 --workers 2 --max-requests=1000 -c course_discovery/docker_gunicorn_configuration.py course_discovery.wsgi:application
+
+FROM app as dev
+
+ENV DJANGO_SETTINGS_MODULE "course_discovery.settings.devstack"
+
+RUN pip install -r ${DISCOVERY_CODE_DIR}/requirements/django.txt
+RUN pip install -r ${DISCOVERY_CODE_DIR}/requirements/local.txt
+
+RUN DISCOVERY_CFG=minimal.yml OPENEDX_ATLAS_PULL=true make pull_translations
+
+# Devstack related step for backwards compatibility
+RUN touch ${DISCOVERY_APP_DIR}/discovery_env
+
+CMD while true; do python ./manage.py runserver 0.0.0.0:8381; sleep 2; done
+
+###########################################################
+# Define k8s target
+FROM prod as kubernetes
+ENV DISCOVERY_SETTINGS='kubernetes'
+ENV DJANGO_SETTINGS_MODULE="course_discovery.settings.$DISCOVERY_SETTINGS"