Create kenLM docker image

Dockerfile

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+FROM python:3.8
+
+WORKDIR /
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    cmake \
+    libboost-system-dev \
+    libboost-thread-dev \
+    libboost-program-options-dev \
+    libboost-test-dev \
+    libeigen3-dev \
+    zlib1g-dev \
+    libbz2-dev \
+    liblzma-dev \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+RUN git clone https://github.com/kpu/kenlm /opt/kenlm
+RUN mkdir -p /opt/kenlm/build && cd /opt/kenlm/build \
+    && cmake .. \
+    && make -j $(nproc)
+
+RUN pip install git+https://github.com/kpu/kenlm.git