Incorporates the base image building back into the main repo with multi stage building

docker-builders/Dockerfile.jbig2enc

@@ -0,0 +1,39 @@
+# This Dockerfile compiles the jbig2enc library
+# Inputs:
+#		- JBIG2ENC_VERSION - the Git tag to checkout and build
+
+FROM debian:bullseye-slim
+
+LABEL org.opencontainers.image.description="A intermediate image with jbig2enc built"
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+ARG BUILD_PACKAGES="\
+  build-essential \
+  automake \
+  libtool \
+  libleptonica-dev \
+  zlib1g-dev \
+  git \
+  ca-certificates"
+
+WORKDIR /usr/src/jbig2enc
+
+# As this is an base image for a multi-stage final image
+# the added size of the install is basically irrelevant
+RUN apt-get update --quiet \
+  && apt-get install --yes --quiet --no-install-recommends ${BUILD_PACKAGES} \
+  && rm -rf /var/lib/apt/lists/*
+
+# Layers after this point change according to required version
+# For better caching, seperate the basic installs from
+# the building
+
+ARG JBIG2ENC_VERSION
+
+RUN set -eux \
+	&& git clone --quiet --branch $JBIG2ENC_VERSION https://github.com/agl/jbig2enc .
+RUN set -eux \
+	&& ./autogen.sh
+RUN set -eux \
+	&& ./configure && make