TesseractNotFound issue when containerizing in docker

Edit 3:
Some of the python packages in requirements.txt have other prerequisites.With this Dockerfile it went successfully through the entire build process.

The trickiest part was to build opencv.
Credits to https://github.com/janza/docker-python3-opencv/blob/master/Dockerfile

.├── Dockerfile└── requirements.txt

Dockerfile:

FROM python:3.7RUN apt-get update \    && apt-get install -y \        build-essential \        cmake \        git \        wget \        unzip \        yasm \        pkg-config \        libswscale-dev \        libtbb2 \        libtbb-dev \        libjpeg-dev \        libpng-dev \        libtiff-dev \        libavformat-dev \        libpq-dev \    && rm -rf /var/lib/apt/lists/*RUN pip install numpyWORKDIR /ENV OPENCV_VERSION="4.1.1"RUN wget https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip \&& unzip ${OPENCV_VERSION}.zip \&& mkdir /opencv-${OPENCV_VERSION}/cmake_binary \&& cd /opencv-${OPENCV_VERSION}/cmake_binary \&& cmake -DBUILD_TIFF=ON \  -DBUILD_opencv_java=OFF \  -DWITH_CUDA=OFF \  -DWITH_OPENGL=ON \  -DWITH_OPENCL=ON \  -DWITH_IPP=ON \  -DWITH_TBB=ON \  -DWITH_EIGEN=ON \  -DWITH_V4L=ON \  -DBUILD_TESTS=OFF \  -DBUILD_PERF_TESTS=OFF \  -DCMAKE_BUILD_TYPE=RELEASE \  -DCMAKE_INSTALL_PREFIX=$(python3.7 -c "import sys; print(sys.prefix)") \  -DPYTHON_EXECUTABLE=$(which python3.7) \  -DPYTHON_INCLUDE_DIR=$(python3.7 -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())") \  -DPYTHON_PACKAGES_PATH=$(python3.7 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())") \  .. \&& make install \&& rm /${OPENCV_VERSION}.zip \&& rm -r /opencv-${OPENCV_VERSION}RUN ln -s \  /usr/local/python/cv2/python-3.7/cv2.cpython-37m-x86_64-linux-gnu.so \  /usr/local/lib/python3.7/site-packages/cv2.soRUN apt-get --fix-missing update && apt-get --fix-broken install && apt-get install -y poppler-utils && apt-get install -y tesseract-ocr && \    apt-get install -y libtesseract-dev && apt-get install -y libleptonica-dev && ldconfig && apt install -y libsm6 libxext6 && apt install -y python-opencvCOPY ./requirements.txt ./ RUN pip3 install --upgrade pip# install dependencies RUN pip3 install -r requirements.txt

Build:

docker image build -t my-awesome-py .

Run:

docker run --rm my-awesome-py tesseractUsage:  tesseract --help | --help-extra | --version  tesseract --list-langs  tesseract imagename outputbase [options...] [configfile...]OCR options:  -l LANG[+LANG]        Specify language(s) used for OCR.NOTE: These options must occur before any configfile.Single options:  --help                Show this help message.  --help-extra          Show extra help for advanced users.  --version             Show version information.  --list-langs          List available languages for tesseract engine.