Integrated spearhead as core for import logic

\approve @ds \fyi @marius

Dockerfile

-# Copyright (c) 2021:
+# Copyright (C) 2021:
 #   Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ
 #
 # This program is free software: you can redistribute it and/or modify it
@@ -19,8 +19,16 @@ FROM debian:bullseye-slim
 ENV DEBIAN_FRONTEND noninteractive
 
 # Install software
-RUN apt-get update
-RUN apt-get install --no-install-recommends -y osm2pgsql postgresql-client
+RUN apt update
+RUN apt install --no-install-recommends -y \
+    ca-certificates \
+    git \
+    osm2pgsql \
+    postgresql-client
+
+# Install spearhead
+RUN cd /usr/local/lib && git clone --branch feature/shell https://git.gfz-potsdam.de/dynamicexposure/openbuildingmap/spearhead.git
+RUN ln -s /usr/local/lib/spearhead/spearhead /usr/local/bin/spearhead
 
 # Cleanup
 RUN apt-get autoremove --yes $build_dependencies && \ 
@@ -30,6 +38,4 @@ RUN apt-get autoremove --yes $build_dependencies && \
 
 VOLUME ["/tmp/import"]
 
-# Start script
-COPY ./files/start.sh /usr/local/bin
-CMD /usr/local/bin/start.sh
+CMD /usr/local/bin/spearhead