adding a mkdir for watonomous install (#239)

Author: Edwardius

docker/base/inject_wato_base.Dockerfile

@@ -16,6 +16,9 @@ ENV USER="bolty"
 ENV AMENT_WS=/home/${USER}/ament_ws
 ENV WATONOMOUS_INSTALL=/opt/watonomous/
 
+# Setup WATonomous Install Directory
+RUN mkdir -p "${WATONOMOUS_INSTALL}"
+
 # User Setup
 RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
     apt-get install -y --no-install-recommends curl sudo && \