Dockerfile: run apt-get install --no-install-recommends

This reduces the packages being installed, and thus the overal container
image build time and size. We do need to explicitly specify libc6-dev
now.

Before:
2 upgraded, 69 newly installed, 0 to remove and 15 not upgraded.
Need to get 70.5 MB of archives.A
After this operation, 267 MB of additional disk space will be used.

After:
2 upgraded, 34 newly installed, 0 to remove and 15 not upgraded.
Need to get 54.0 MB of archives.
After this operation, 210 MB of additional disk space will be used.

Dockerfile

@@ -5,7 +5,7 @@ WORKDIR /app
 COPY requirements.txt .
 
 # Install gcc temporarily until wheels for httptools on Python 3.12 are available
-RUN apt-get update && apt-get install -y gcc libmagic1 && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install --no-install-recommends -y gcc libc6-dev libmagic1 && rm -rf /var/lib/apt/lists/*
 
 RUN --mount=type=cache,target=/root/.cache pip install -r requirements.txt