build: Improve Docker image and add version in hash.txt

In mitodl/release-script#400 Doof gains the ability to parse
versions. This adds the necessary information in the hash.txt to allow Doof to properly
detect production deployments of this app.

Author: blarghmatey

.pre-commit-config.yaml

@@ -7,6 +7,7 @@ ci:
     # Because these are local hooks it seems like they won't easily run in pre-commit CI
     - eslint
     - style-lint
+    - hadolint-docker
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v5.0.0
@@ -89,3 +90,7 @@ repos:
     hooks:
       - id: shellcheck
         args: ["--severity=warning"]
+  - repo: https://github.com/hadolint/hadolint
+    rev: v2.12.0
+    hooks:
+      - id: hadolint-docker

Dockerfile

@@ -1,50 +1,54 @@
+# hadolint global ignore=DL3008,SC2046
 FROM python:3.12.6
-LABEL maintainer "ODL DevOps <[email protected]>"
+LABEL org.opencontainers.image.authors="ODL DevOps <[email protected]>"
+
+# Set shell to bash with pipefail
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 # Add package files, install updated node and pip
 WORKDIR /tmp
 
 # Install packages
 COPY apt.txt /tmp/apt.txt
-RUN apt-get update
-RUN apt-get install -y $(grep -vE "^\s*#" apt.txt  | tr "\n" " ")
-RUN apt-get update && apt-get install libpq-dev postgresql-client -y
-
-# pip
-RUN curl --silent --location https://bootstrap.pypa.io/get-pip.py | python3 -
+RUN apt-get update \
+    && apt-get install -y \
+    --no-install-recommends \
+    libpq-dev \
+    postgresql-client \
+    $(grep -vE '^\s*#' apt.txt  | tr '\n' ' ') \
+    && apt-get clean \
+    && apt-get purge \
+    && rm -rf /var/lib/apt/lists/*
 
 # Add, and run as, non-root user.
-RUN mkdir /src
-RUN adduser --disabled-password --gecos "" mitodl
-RUN mkdir /var/media && chown -R mitodl:mitodl /var/media
+RUN mkdir /src \
+    && adduser --disabled-password --gecos "" mitodl \
+    && mkdir /var/media && chown -R mitodl:mitodl /var/media
 
 ## Set some poetry config
 ENV  \
-  POETRY_VERSION=1.7.1 \
+  PYTHON_UNBUFFERED=1 \
+  POETRY_VERSION=1.8.5 \
   POETRY_VIRTUALENVS_CREATE=true \
   POETRY_CACHE_DIR='/tmp/cache/poetry' \
   POETRY_HOME='/home/mitodl/.local' \
   VIRTUAL_ENV="/opt/venv"
 ENV PATH="$VIRTUAL_ENV/bin:$POETRY_HOME/bin:$PATH"
 
 # Install poetry
-RUN pip install "poetry==$POETRY_VERSION"
+RUN pip install --no-cache-dir "poetry==$POETRY_VERSION"
 
 COPY pyproject.toml /src
 COPY poetry.lock /src
-RUN chown -R mitodl:mitodl /src
-RUN mkdir ${VIRTUAL_ENV} && chown -R mitodl:mitodl ${VIRTUAL_ENV}
+RUN chown -R mitodl:mitodl /src && \
+    mkdir ${VIRTUAL_ENV} && \
+    chown -R mitodl:mitodl ${VIRTUAL_ENV}
 
 ## Install poetry itself, and pre-create a venv with predictable name
 USER mitodl
-RUN curl -sSL https://install.python-poetry.org \
-  | \
-  POETRY_VERSION=${POETRY_VERSION} \
-  POETRY_HOME=${POETRY_HOME} \
-  python3 -q
 WORKDIR /src
-RUN python3 -m venv $VIRTUAL_ENV
-RUN poetry install
+RUN python3 -m venv $VIRTUAL_ENV && \
+    poetry install
 
 # Add project
 USER root
@@ -53,28 +57,12 @@ WORKDIR /src
 
 # Generate commit hash file
 ARG GIT_REF
-RUN mkdir -p /src/static
-RUN echo $GIT_REF >> /src/static/hash.txt
-
-# Run collectstatic
-ENV DATABASE_URL="postgres://postgres:postgres@localhost:5433/postgres"
-ENV MITOL_SECURE_SSL_REDIRECT="False"
-ENV MITOL_DB_DISABLE_SSL="True"
-ENV MITOL_FEATURES_DEFAULT="True"
-ENV CELERY_TASK_ALWAYS_EAGER="True"
-ENV CELERY_BROKER_URL="redis://localhost:6379/4"
-ENV CELERY_RESULT_BACKEND="redis://localhost:6379/4"
-ENV MITOL_APP_BASE_URL="http://localhost:8002/"
-ENV MAILGUN_KEY="fake_mailgun_key"
-ENV MAILGUN_SENDER_DOMAIN="other.fake.site"
-ENV MITOL_COOKIE_DOMAIN="localhost"
-ENV MITOL_COOKIE_NAME="cookie_monster"
-RUN python3 manage.py collectstatic --noinput --clear
-
-RUN apt-get clean && apt-get purge
+ARG RELEASE_VERSION
+RUN mkdir -p /src/static \
+    && echo "{\"version\": \"$RELEASE_VERSION\", \"hash\": \"$GIT_REF\"}" >> /src/static/hash.txt
 
 USER mitodl
 
 EXPOSE 8888
 EXPOSE 8001
-ENV PORT 8001
+ENV PORT=8001