build: upgrade to go 1.17 and upgrade dependencies

vendor/gocv.io/x/gocv/Dockerfile

@@ -1,60 +1,12 @@
-FROM ubuntu:16.04 AS opencv
-LABEL maintainer="hybridgroup"
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
-            git build-essential cmake pkg-config unzip libgtk2.0-dev \
-            curl ca-certificates libcurl4-openssl-dev libssl-dev \
-            libavcodec-dev libavformat-dev libswscale-dev libtbb2 libtbb-dev \
-            libjpeg-dev libpng-dev libtiff-dev libdc1394-22-dev && \
-            rm -rf /var/lib/apt/lists/*
-
-ARG OPENCV_VERSION="4.2.0"
-ENV OPENCV_VERSION $OPENCV_VERSION
-
-RUN curl -Lo opencv.zip https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip && \
-            unzip -q opencv.zip && \
-            curl -Lo opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/${OPENCV_VERSION}.zip && \
-            unzip -q opencv_contrib.zip && \
-            rm opencv.zip opencv_contrib.zip && \
-            cd opencv-${OPENCV_VERSION} && \
-            mkdir build && cd build && \
-            cmake -D CMAKE_BUILD_TYPE=RELEASE \
-                  -D CMAKE_INSTALL_PREFIX=/usr/local \
-                  -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-${OPENCV_VERSION}/modules \
-                  -D WITH_JASPER=OFF \
-                  -D BUILD_DOCS=OFF \
-                  -D BUILD_EXAMPLES=OFF \
-                  -D BUILD_TESTS=OFF \
-                  -D BUILD_PERF_TESTS=OFF \
-                  -D BUILD_opencv_java=NO \
-                  -D BUILD_opencv_python=NO \
-                  -D BUILD_opencv_python2=NO \
-                  -D BUILD_opencv_python3=NO \
-                  -D OPENCV_GENERATE_PKGCONFIG=ON .. && \
-            make -j $(nproc --all) && \
-            make preinstall && make install && ldconfig && \
-            cd / && rm -rf opencv*
-
-#################
-#  Go + OpenCV  #
-#################
-FROM opencv AS gocv
-LABEL maintainer="hybridgroup"
-
-ARG GOVERSION="1.13.5"
-ENV GOVERSION $GOVERSION
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
-            git software-properties-common && \
-            curl -Lo go${GOVERSION}.linux-amd64.tar.gz https://dl.google.com/go/go${GOVERSION}.linux-amd64.tar.gz && \
-            tar -C /usr/local -xzf go${GOVERSION}.linux-amd64.tar.gz && \
-            rm go${GOVERSION}.linux-amd64.tar.gz && \
-            rm -rf /var/lib/apt/lists/*
+# to build this docker image:
+#   docker build .
+FROM gocv/opencv:4.5.3
 
 ENV GOPATH /go
-ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
 
-RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 777 "$GOPATH"
-WORKDIR $GOPATH
+COPY . /go/src/gocv.io/x/gocv/
 
-RUN go get -u -d gocv.io/x/gocv && go run ${GOPATH}/src/gocv.io/x/gocv/cmd/version/main.go
+WORKDIR /go/src/gocv.io/x/gocv
+RUN go build -tags example -o /build/gocv_version -i ./cmd/version/
+
+CMD ["/build/gocv_version"]