add ubuntu openexr2 shared docker

.github/workflows/docker_linuxes.yml

@@ -203,3 +203,13 @@ jobs:
 
     - name: Run unit tests (ctest) within the Docker image
       run: docker run ctl:latest sh -c "cd ./build && ctest"
+
+  ubuntu-openexr2-shared:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build the Docker image
+        run: docker build --no-cache --rm -f ./docker/Dockerfile_ubuntu_22.04_openexr2_shared -t ctl:latest .
+
+      - name: Run unit tests (ctest) within the Docker image
+        run: docker run ctl:latest sh -c "cd ./build && ctest"  

docker/Dockerfile_ubuntu_22.04_openexr2_shared

@@ -0,0 +1,44 @@
+FROM ubuntu:22.04
+
+RUN apt-get update
+
+# disable interactive install 
+ENV DEBIAN_FRONTEND noninteractive
+
+# install developement tools
+RUN apt-get -y install cmake
+RUN apt-get -y install g++
+RUN apt-get -y install git
+
+# install CTL dependencies
+#RUN apt-get -y install libopenexr-dev
+#RUN apt-get -y install libtiff-dev
+
+# install CTL dependencies - zlib
+RUN apt-get -y install zlib1g-dev
+
+# install CTL dependecies - openexr
+WORKDIR /usr/src/
+RUN git clone https://github.com/AcademySoftwareFoundation/openexr.git
+WORKDIR /usr/src/openexr
+RUN git checkout RB-2.5 
+WORKDIR /usr/src/openexr/build
+RUN cmake ..  -DBUILD_SHARED_LIBS=ON -DBUILD_TESTING=OFF -DOPENEXR_BUILD_TOOLS=OFF -DOPENEXR_INSTALL_EXAMPLES=OFF
+RUN make
+RUN make install
+
+# build CTL
+WORKDIR /usr/src/CTL
+COPY . .
+WORKDIR /usr/src/CTL/build
+RUN rm -R * || true
+RUN cmake -DBUILD_SHARED_LIBS=ON ..
+RUN make
+RUN make install
+
+# add /usr/local/lib to the LD_LIBRARY_PATH
+ENV LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
+
+# finalize docker environment
+WORKDIR /usr/src/CTL
+