Fabian/update ttpv1 mesh - #71

UndefinedVar: Usage of undefined variable '$PYTHONPATH' More info: https://docs.docker.com/go/dockerfile/rule/undefined-var/

UndefinedVar: Usage of undefined variable '$LD_LIBRARY_PATH' More info: https://docs.docker.com/go/dockerfile/rule/undefined-var/

UndefinedVar: Usage of undefined variable '$CPATH' (did you mean $PATH?) More info: https://docs.docker.com/go/dockerfile/rule/undefined-var/

UndefinedVar: Usage of undefined variable '$CMAKE_PREFIX_PATH' More info: https://docs.docker.com/go/dockerfile/rule/undefined-var/

UndefinedVar: Usage of undefined variable '$PKG_CONFIG_PATH' More info: https://docs.docker.com/go/dockerfile/rule/undefined-var/