Updated python and opencv

Author: handflucht

Dockerfile

@@ -1,5 +1,5 @@
-FROM python:3.7
-MAINTAINER Josip Janzic <josip@jjanzic.com>
+FROM python:3.9
+LABEL mantainer="Josip Janzic <josip@jjanzic.com>"
 
 RUN apt-get update \
     && apt-get install -y \
@@ -23,7 +23,7 @@ RUN apt-get update \
 RUN pip install numpy
 
 WORKDIR /
-ENV OPENCV_VERSION="4.1.1"
+ENV OPENCV_VERSION="4.5.0"
 RUN wget https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip \
 && unzip ${OPENCV_VERSION}.zip \
 && mkdir /opencv-${OPENCV_VERSION}/cmake_binary \
@@ -40,14 +40,14 @@ RUN wget https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip \
   -DBUILD_TESTS=OFF \
   -DBUILD_PERF_TESTS=OFF \
   -DCMAKE_BUILD_TYPE=RELEASE \
-  -DCMAKE_INSTALL_PREFIX=$(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=$(python3.7 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())") \
+  -DCMAKE_INSTALL_PREFIX=$(python3.9 -c "import sys; print(sys.prefix)") \
+  -DPYTHON_EXECUTABLE=$(which python3.9) \
+  -DPYTHON_INCLUDE_DIR=$(python3.9 -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())") \
+  -DPYTHON_PACKAGES_PATH=$(python3.9 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())") \
   .. \
 && make install \
 && rm /${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.so
+  /usr/local/python/cv2/python-3.9/cv2.cpython-37m-x86_64-linux-gnu.so \
+  /usr/local/lib/python3.9/site-packages/cv2.so