Add the ICAP client in the Docker image (#62)

Having an ICAP client available to the scanner is a v.useful thing

Author: benbz

docker/Dockerfile

@@ -2,9 +2,10 @@ ARG PYTHON_VERSION=3.9
 
 FROM docker.io/python:${PYTHON_VERSION}-slim
 
-# Install libmagic. We don't need to install libolm, because we're installing it with a
+# Install libmagic & other useful tools.
+# We don't need to install libolm, because we're installing it with a
 # wheel from gitlab.matrix.org later, which comes with libolm already compiled.
-RUN apt-get update -qq && apt-get install -qq libmagic1
+RUN apt-get update -qq && apt-get install -qq libmagic1 c-icap && rm -rf /var/lib/apt/lists/*
 
 # Copy the necessary project files into the image.
 COPY setup.cfg pyproject.toml README.md /
@@ -22,4 +23,4 @@ RUN mkdir /data
 WORKDIR /data
 
 # Start the service using user-provided configuration.
-ENTRYPOINT ["python", "-m", "matrix_content_scanner.mcs", "-c", "/data/config.yaml"]
+ENTRYPOINT ["python", "-m", "matrix_content_scanner.mcs", "-c", "/data/config.yaml"]