Draft: Testing autoinstall

tests/autoinstall_dockerfile

+ARG IMG
+FROM $IMG
+# For unbuntu:
+RUN apt update && apt install -y ca-certificates python3 && update-ca-certificates
+RUN useradd -s /bin/bash -m otbuser
+WORKDIR /home/otbuser
+USER otbuser
+COPY . /home/otbuser/pyotb
+RUN PYTHONPATH=/home/otbuser/pyotb/pyotb python3 -c "import install; assert install.install_otb()"
+RUN PYTHONPATH=/home/otbuser/pyotb python3 -c "import pyotb"