finally! a working config

Author: maphew

.gitpod.Dockerfile

@@ -1,5 +1,8 @@
-FROM osgeo/ubuntu-small-latest
-RUN apt install sudo \
-  && add-apt-repository -y ppa:ubuntugis/ubuntugis-unstable \
-  && apt install -y libproj-dev
+FROM osgeo/gdal:ubuntu-small-latest
+RUN uname -a && cat /etc/os-release
+# RUN apt-get install -y software-properties-common
+# RUN add-apt-repository -y ppa:ubuntugis/ubuntugis-unstable
+    # results in "E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?"
+RUN apt-get update --fix-missing
+RUN apt-get install -y sudo libproj-dev
 ENV CMAKE_BUILD_TYPE=release