diff --git a/Dockerfile b/Dockerfile
index 89c32270ce4f6189b7272c6b7b660c8bbf4e98d4..ba0538de8add148247d02fff887c4cdf70ad0e7a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# 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
diff --git a/README.rst b/README.rst
index 3969f1b65276291c16e8f18b4ed4d12ffd00f051..1fd1ebff79a3d71260bd2f3972dc23ff7f36c666 100644
--- a/README.rst
+++ b/README.rst
@@ -3,17 +3,17 @@ Docker OBM import OSM
 =====================
 
 Import data from OpenStreetMap (OSM) to the OpenBuildingMap (OBM) Buildings database using
-`osm2pgsql <https://github.com/openstreetmap/osm2pgsql>`__ and keep it up-to-data through
-pulling regular updates from OSM.
+`spearhead <https://git.gfz-potsdam.de/dynamicexposure/openbuildingmap/spearhead>`__ and keep
+it up-to-data through pulling regular updates from OSM.
 
 Define variables
 ----------------
 
-* :code:`OBM_DATABASE_HOST` - Host url or IP of the database
-* :code:`OBM_DATABASE_NAME` - Name of the database
-* :code:`OBM_DATABASE_USER` - User to connect to the database
-* :code:`OBM_IMPORT_STYLE` - Absolute path to an available osm2pgsql style file
-* :code:`OBM_IMPORT_FILE` - Absolute path to an available OSM pbf-file containing data of an area
+* :code:`SPEARHEAD_DATABASE_HOST` - Host url or IP of the database
+* :code:`SPEARHEAD_DATABASE_NAME` - Name of the database
+* :code:`SPEARHEAD_DATABASE_USER` - User to connect to the database
+* :code:`SPEARHEAD_IMPORT_STYLE` - Absolute path to an available osm2pgsql style file
+* :code:`SPEARHEAD_IMPORT_FILE` - Absolute path to an available OSM pbf-file containing data of an area
 
 Copyright and copyleft
 ----------------------
diff --git a/files/start.sh b/files/start.sh
deleted file mode 100755
index def2ecc42fac7d53af5d9269275b52e1c0ad458f..0000000000000000000000000000000000000000
--- a/files/start.sh
+++ /dev/null
@@ -1,193 +0,0 @@
-#!/bin/bash
-#
-# Initialize import of OpenStreetMap data into OpenBuildingMap
-
-# Copyright (C) 2021:
-#   Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ
-#
-# This program is free software: you can redistribute it and/or modify it
-# under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or (at
-# your option) any later version.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero
-# General Public License for more details.
-#
-# You should have received a copy of the GNU Affero General Public License
-# along with this program. If not, see http://www.gnu.org/licenses/.
-
-#######################################
-# Main function of this script, to be executed for initial import.
-# Globals:
-#   OBM_DATABASE_HOST
-#   OBM_DATABASE_NAME
-# Arguments:
-#   None
-#######################################
-function main() {
-  printf "Connecting to PostgreSQL on '%s':\n" "${OBM_DATABASE_HOST}"
-
-  # Wait until database comes up and is available
-  until execute_database_command "SELECT datname FROM pg_database;"; do
-    printf "Database is unavailable - trying again in 10s\n"
-    sleep 10
-  done
-
-  # Initiate new or reuse existing database
-  if execute_database_command "\connect ${OBM_DATABASE_NAME}"; then
-    printf "Reuse existing database: %s\n" "${OBM_DATABASE_NAME}"
-  else
-    execute_database_command "CREATE DATABASE ${OBM_DATABASE_NAME};"
-    add_database_extensions
-    printf "Initiated new database: %s\n" "${OBM_DATABASE_NAME}"
-  fi
-
-  # Obtain mapping information for database schema
-  assemble_opentstreetmap_database_style
-
-  # Import OpenStreetMap data if database is empty
-  database_exists=$(psql --host="${OBM_DATABASE_HOST}" \
-    --username="${OBM_DATABASE_USER}" "${OBM_DATABASE_NAME}" --tuples-only \
-    --command="SELECT CASE WHEN EXISTS \
-	  (SELECT FROM pg_tables WHERE schemaname = 'public' \
-	  AND tablename = 'planet_osm_line' LIMIT 1) THEN 'true' ELSE 'false' end;")
-  if ${database_exists}; then
-    printf "Assuming already imported database: %s\n" "${OBM_DATABASE_NAME}"
-  else
-    import_openstreetmap_data
-    printf "OpenStreetMap data has been imported.\n"
-  fi
-}
-
-#######################################
-# Exectute postgresql command outside of a specific database.
-# Globals:
-#   OBM_DATABASE_HOST
-#   OBM_DATABASE_USER
-# Arguments:
-#   Query command
-#######################################
-function execute_database_command() {
-  psql --host="${OBM_DATABASE_HOST}" --username="${OBM_DATABASE_USER}" --command="${1}"
-}
-
-#######################################
-# Exectute postgresql query on a certain database.
-# Globals:
-#   OBM_DATABASE_HOST
-#   OBM_DATABASE_NAME
-#   OBM_DATABASE_USER
-# Arguments:
-#   Query command
-#######################################
-function execute_database_query() {
-  psql --host="${OBM_DATABASE_HOST}" --username="${OBM_DATABASE_USER}" "${OBM_DATABASE_NAME}" \
-    --command="${1}"
-}
-
-#######################################
-# Add geospatial and advanced index extensions to a postgresql database.
-# Globals:
-#   OBM_DATABASE_HOST
-#   OBM_DATABASE_NAME
-#   OBM_DATABASE_USER
-# Arguments:
-#   None
-#######################################
-function add_database_extensions() {
-  if psql --host"=${OBM_DATABASE_HOST}" --username="${OBM_DATABASE_USER}" \
-    --command="\connect ${OBM_DATABASE_NAME}"; then
-
-    if execute_database_query "CREATE EXTENSION postgis;"; then
-      printf " postgis extension added to %s database.\n" "${OBM_DATABASE_NAME}"
-    else
-      printf " Could not add postgis extension added to %s database.\nAborting.\n" "${OBM_DATABASE_NAME}"
-      exit 1
-    fi
-
-    if execute_database_query "CREATE EXTENSION hstore;"; then
-      printf " hstore extension added to %s database.\n" "${OBM_DATABASE_NAME}"
-    else
-      printf " Could not add hstore extension added to %s database.\nAborting.\n" "${OBM_DATABASE_NAME}"
-      exit 1
-    fi
-
-    if execute_database_query "CREATE EXTENSION btree_gin;"; then
-      printf " btree_gin extension added to %s database.\n" "${OBM_DATABASE_NAME}"
-    else
-      printf " Could not add btree_gin extension added to %s database.\nAborting.\n" "${OBM_DATABASE_NAME}"
-      exit 1
-    fi
-
-    if execute_database_query "CREATE EXTENSION btree_gist;"; then
-      printf " btree_gist extension added to %s database.\n" "${OBM_DATABASE_NAME}"
-    else
-      printf " Could not add btree_gist extension added to %s database.\nAborting.\n" "${OBM_DATABASE_NAME}"
-      exit 1
-    fi
-
-  else
-    printf "Error: Unable to connect to database: %s\n" "${OBM_DATABASE_NAME}"
-    exit 1
-  fi
-}
-
-#######################################
-# # Prepare style file for osm2pgsql, based on standard 'empty.style' and provided style file.
-# Globals:
-#   OBM_IMPORT_STYLE
-# Arguments:
-#   None
-# Outputs:
-#   Writes combined style file to '/usr/share/osm2pgsql/the.style'
-#######################################
-function assemble_opentstreetmap_database_style() {
-  base_style="/usr/share/osm2pgsql/empty.style"
-  if [[ ! -r "${base_style}" ]]; then
-    printf "Cannot find the 'empty.style' file of osm2pgsql\n"
-    exit 1
-  fi
-  cat /usr/share/osm2pgsql/empty.style >/usr/share/osm2pgsql/the.style
-  cat "${OBM_IMPORT_STYLE}" >>/usr/share/osm2pgsql/the.style
-}
-
-#######################################
-# # Import OpenStreetMap Data file into database with osm2pgsql.
-# Globals:
-#   OBM_IMPORT_FILE
-#   OBM_DATABASE_HOST
-#   OBM_DATABASE_USER
-#   OBM_DATABASE_NAME
-# Arguments:
-#   None
-#######################################
-function import_openstreetmap_data() {
-  if [[ -f "${OBM_IMPORT_FILE}" ]]; then
-    printf " \nImporting OpenStreetMap data with "
-    osm2pgsql \
-      --host "${OBM_DATABASE_HOST}" --username "${OBM_DATABASE_USER}" \
-      --database "${OBM_DATABASE_NAME}" \
-      --verbose \
-      --create \
-      --slim \
-      --style "/usr/share/osm2pgsql/the.style" \
-      --multi-geometry \
-      --hstore \
-      --latlong \
-      --extra-attributes \
-      --hstore-add-index \
-      --cache-strategy dense \
-      "${OBM_IMPORT_FILE}"
-  else
-    printf "Error: Import file '%s' not found.\nAborting.\n" "${OBM_IMPORT_FILE}"
-    exit 1
-  fi
-}
-
-# Start the script
-printf "\nWelcome to the OpenBuildingMap importer\n\n"
-
-# Call main function of the script
-main