Run yarn build during docker build (#1158)

This will alliviate the merge conflicts we keep getting by checking this
file into source control.


-----------

Now, when using docker-compose, to re-generate the `styles.css` file,
you can do so locally in the following ways:

1. locally run `yarn build`
2. run `docker compose build`

docker/Dockerfile

@@ -4,19 +4,34 @@ FROM python:3.11-slim AS builder-py
 
 RUN apt update && apt install -y build-essential gcc python-dev-is-python3 libpq-dev postgresql-client ruby ruby-dev && rm -rf /var/lib/apt/lists/*
 
-# Install Asciidoctor
+# Install ruby's asciidoctor.
 RUN gem install asciidoctor
 
-RUN pip install -U uv
+# Upgrade to the latest pip.
+RUN pip install --upgrade pip
 
+# Boostrap uv.
+RUN pip install 'uv>=0.2.27,<0.3'
 COPY ./requirements.txt ./code/requirements.txt
 
-RUN python3 -m venv /venv
+# Create the virtualenv.
+RUN uv venv venv
 
+# Activate the virtualenv and install the requirements.
 RUN --mount=type=cache,target=/root/.cache \
     . /venv/bin/activate && \
     uv pip install -r /code/requirements.txt
 
+
+# Builder step for JS.
+FROM node:22-slim AS builder-js
+
+COPY . /code/
+WORKDIR /code/
+RUN yarn build
+
+
+# Final image.
 FROM python:3.11-slim AS release
 
 RUN apt update && apt install -y git libpq-dev ruby ruby-dev && rm -rf /var/lib/apt/lists/*
@@ -24,6 +39,9 @@ RUN apt update && apt install -y git libpq-dev ruby ruby-dev && rm -rf /var/lib/
 # Install Asciidoctor
 RUN gem install asciidoctor
 
+# Boostrap uv.
+RUN pip install'uv>=0.2.27,<0.3'
+
 ENV PATH /venv/bin:/bin:/usr/bin:/usr/local/bin
 ENV PYTHONDONTWRITEBYTECODE=true
 ENV PYTHONPATH /code
@@ -34,6 +52,7 @@ RUN mkdir /code
 
 COPY --from=builder-py /venv/ /venv/
 COPY --from=builder-py /code/ /code/
+COPY --from=builder-js /code/static/css/styles.css /code/static/css/styles.css
 COPY . /code/
 
 WORKDIR /code