diff --git a/Dockerfile b/Dockerfile
index 134503d..2568afa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,185 +1,213 @@
-FROM ubuntu:20.04
+FROM ubuntu:20.04 AS compiler-common
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update \
+&& apt-get install -y --no-install-recommends \
+ git-core \
+ checkinstall \
+ g++ \
+ make \
+ tar \
+ wget \
+ ca-certificates
+
+###########################################################################################################
+
+FROM compiler-common AS compiler-postgis
+RUN apt-get install -y --no-install-recommends \
+ postgresql-server-dev-12 \
+ libxml2-dev \
+ libgeos-dev \
+ libproj-dev
+RUN wget https://download.osgeo.org/postgis/source/postgis-3.1.1.tar.gz -O postgis.tar.gz \
+&& mkdir -p postgis_src \
+&& tar -xvzf postgis.tar.gz --strip 1 -C postgis_src \
+&& rm postgis.tar.gz \
+&& cd postgis_src \
+&& ./configure --without-protobuf --without-raster \
+&& make -j $(nproc) \
+&& checkinstall --pkgversion="3.1.1" --install=no --default make install
+
+###########################################################################################################
+
+FROM compiler-common AS compiler-osm2pgsql
+RUN apt-get install -y --no-install-recommends \
+ cmake \
+ libboost-dev \
+ libboost-system-dev \
+ libboost-filesystem-dev \
+ libexpat1-dev \
+ zlib1g-dev \
+ libbz2-dev \
+ libpq-dev \
+ libproj-dev \
+ lua5.3 \
+ liblua5.3-dev \
+ pandoc
+RUN cd ~ \
+&& git clone -b master --single-branch https://github.com/openstreetmap/osm2pgsql.git --depth 1 \
+&& cd osm2pgsql \
+&& mkdir build \
+&& cd build \
+&& cmake .. \
+&& make -j $(nproc) \
+&& checkinstall --pkgversion="1" --install=no --default make install
+
+###########################################################################################################
+
+FROM compiler-common AS compiler-modtile-renderd
+RUN apt-get install -y --no-install-recommends \
+ apache2-dev \
+ automake \
+ autoconf \
+ autotools-dev \
+ libtool \
+ libmapnik-dev
+RUN cd ~ \
+&& git clone -b switch2osm --single-branch https://github.com/SomeoneElseOSM/mod_tile.git --depth 1 \
+&& cd mod_tile \
+&& ./autogen.sh \
+&& ./configure \
+&& make -j $(nproc) \
+&& checkinstall --pkgversion="1" --install=no --pkgname "renderd" --default make install \
+&& checkinstall --pkgversion="1" --install=no --pkgname "mod_tile" --default make install-mod_tile
+
+###########################################################################################################
+
+FROM compiler-common AS compiler-stylesheet
+RUN apt-get install -y --no-install-recommends \
+ npm
+RUN cd ~ \
+&& git clone --single-branch --branch v5.3.1 https://github.com/gravitystorm/openstreetmap-carto.git --depth 1 \
+&& cd openstreetmap-carto \
+&& sed -ie 's#https:\/\/naciscdn.org\/naturalearth\/110m\/cultural\/ne_110m_admin_0_boundary_lines_land.zip#https:\/\/naturalearth.s3.amazonaws.com\/110m_cultural\/ne_110m_admin_0_boundary_lines_land.zip#g' external-data.yml \
+&& npm install -g carto@0.18.2 \
+&& carto project.mml > mapnik.xml
+
+###########################################################################################################
+
+FROM compiler-common AS compiler-helper-script
+RUN mkdir -p /home/renderer/src \
+&& cd /home/renderer/src \
+&& git clone https://github.com/zverik/regional \
+&& cd regional \
+&& git checkout 889d630a1e1a1bacabdd1dad6e17b49e7d58cd4b \
+&& rm -rf .git \
+&& chmod u+x /home/renderer/src/regional/trim_osc.py
+
+###########################################################################################################
+
+FROM ubuntu:20.04 AS final-base
 
 # Based on
 # https://switch2osm.org/serving-tiles/manually-building-a-tile-server-18-04-lts/
-
-# Set up environment
-ENV TZ=UTC
+ENV DEBIAN_FRONTEND=noninteractive
 ENV AUTOVACUUM=on
 ENV UPDATES=disabled
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
-# Install dependencies
+# Get packages
 RUN apt-get update \
-  && apt-get install -y wget gnupg2 lsb-core apt-transport-https ca-certificates curl \
-  && wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
-  && echo "deb [ trusted=yes ] https://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" | tee /etc/apt/sources.list.d/pgdg.list \
-  && wget --quiet -O - https://deb.nodesource.com/setup_14.x | bash - \
-  && apt-get update \
-  && apt-get install -y nodejs
-
-RUN apt-get install -y --no-install-recommends \
-  apache2 \
-  apache2-dev \
-  autoconf \
-  build-essential \
-  bzip2 \
-  cmake \
-  cron \
-  fonts-noto-cjk \
-  fonts-noto-hinted \
-  fonts-noto-unhinted \
-  gcc \
-  gdal-bin \
-  git-core \
-  libagg-dev \
-  libboost-filesystem-dev \
-  libboost-system-dev \
-  libbz2-dev \
-  libcairo-dev \
-  libcairomm-1.0-dev \
-  libexpat1-dev \
-  libfreetype6-dev \
-  libgdal-dev \
-  libgeos++-dev \
-  libgeos-dev \
-  libicu-dev \
-  liblua5.3-dev \
-  libmapnik-dev \
-  libpq-dev \
-  libproj-dev \
-  libprotobuf-c-dev \
-  libtiff5-dev \
-  libtool \
-  libxml2-dev \
-  lua5.3 \
-  make \
-  mapnik-utils \
-  osmium-tool \
-  osmosis \
-  postgis \
-  postgresql-12 \
-  postgresql-contrib-12 \
-  postgresql-server-dev-12 \
-  protobuf-c-compiler \
-  python-is-python3 \
-  python3-mapnik \
-  python3-lxml \
-  python3-psycopg2 \
-  python3-shapely \
-  python3-pip \
-  sudo \
-  tar \
-  ttf-unifont \
-  unzip \
-  wget \
-  zlib1g-dev \
+&& apt-get install -y --no-install-recommends \
+ apache2 \
+ cron \
+ fonts-noto-cjk \
+ fonts-noto-hinted \
+ fonts-noto-unhinted \
+ gdal-bin \
+ liblua5.3-dev \
+ lua5.3 \
+ mapnik-utils \
+ osmium-tool \
+ osmosis \
+ postgresql-12 \
+ python-is-python3 \
+ python3-mapnik \
+ python3-lxml \
+ python3-psycopg2 \
+ python3-shapely \
+ python3-pip \
+ sudo \
+ ttf-unifont \
+ wget \
 && apt-get clean autoclean \
 && apt-get autoremove --yes \
 && rm -rf /var/lib/{apt,dpkg,cache,log}/
 
-# Install python libraries
-RUN pip3 install requests \
- && pip3 install pyyaml
-
-# Set up PostGIS
-RUN wget https://download.osgeo.org/postgis/source/postgis-3.1.1.tar.gz -O postgis.tar.gz \
- && mkdir -p postgis_src \
- && tar -xvzf postgis.tar.gz --strip 1 -C postgis_src \
- && rm postgis.tar.gz \
- && cd postgis_src \
- && ./configure \
- && make -j $(nproc) \
- && make -j $(nproc) install \
- && cd .. && rm -rf postgis_src
-
-# Set up renderer user
 RUN adduser --disabled-password --gecos "" renderer
 
-# Install latest osm2pgsql
-RUN mkdir -p /home/renderer/src \
- && cd /home/renderer/src \
- && git clone -b master https://github.com/openstreetmap/osm2pgsql.git --depth 1 \
- && cd /home/renderer/src/osm2pgsql \
- && rm -rf .git \
- && mkdir build \
- && cd build \
- && cmake .. \
- && make -j $(nproc) \
- && make -j $(nproc) install \
- && mkdir /nodes \
- && chown renderer:renderer /nodes \
- && rm -rf /home/renderer/src/osm2pgsql
-
-# Install mod_tile and renderd
-RUN mkdir -p /home/renderer/src \
- && cd /home/renderer/src \
- && git clone -b switch2osm https://github.com/SomeoneElseOSM/mod_tile.git --depth 1 \
- && cd mod_tile \
- && rm -rf .git \
- && ./autogen.sh \
- && ./configure \
- && make -j $(nproc) \
- && make -j $(nproc) install \
- && make -j $(nproc) install-mod_tile \
- && ldconfig \
- && cd ..
-
-# Configure stylesheet
-RUN mkdir -p /home/renderer/src \
- && cd /home/renderer/src \
- && git clone --single-branch --branch v5.3.1 https://github.com/gravitystorm/openstreetmap-carto.git --depth 1 \
- && cd openstreetmap-carto \
- && rm -rf .git \
- && sed -ie 's#https:\/\/naciscdn.org\/naturalearth\/110m\/cultural\/ne_110m_admin_0_boundary_lines_land.zip#https:\/\/naturalearth.s3.amazonaws.com\/110m_cultural\/ne_110m_admin_0_boundary_lines_land.zip#g' external-data.yml \
- && npm install -g carto@0.18.2 \
- && carto project.mml > mapnik.xml
-
-# Configure renderd
-RUN sed -i 's/renderaccount/renderer/g' /usr/local/etc/renderd.conf \
- && sed -i 's/\/truetype//g' /usr/local/etc/renderd.conf \
- && sed -i 's/hot/tile/g' /usr/local/etc/renderd.conf
+# Install python libraries
+RUN pip3 install \
+ requests \
+ pyyaml
 
 # Configure Apache
 RUN mkdir /var/lib/mod_tile \
- && chown renderer /var/lib/mod_tile \
- && mkdir /var/run/renderd \
- && chown renderer /var/run/renderd \
- && echo "LoadModule tile_module /usr/lib/apache2/modules/mod_tile.so" >> /etc/apache2/conf-available/mod_tile.conf \
- && echo "LoadModule headers_module /usr/lib/apache2/modules/mod_headers.so" >> /etc/apache2/conf-available/mod_headers.conf \
- && a2enconf mod_tile && a2enconf mod_headers
+&& chown renderer /var/lib/mod_tile \
+&& mkdir /var/run/renderd \
+&& chown renderer /var/run/renderd \
+&& echo "LoadModule tile_module /usr/lib/apache2/modules/mod_tile.so" >> /etc/apache2/conf-available/mod_tile.conf \
+&& echo "LoadModule headers_module /usr/lib/apache2/modules/mod_headers.so" >> /etc/apache2/conf-available/mod_headers.conf \
+&& a2enconf mod_tile && a2enconf mod_headers
 COPY apache.conf /etc/apache2/sites-available/000-default.conf
 COPY leaflet-demo.html /var/www/html/index.html
 RUN ln -sf /dev/stdout /var/log/apache2/access.log \
- && ln -sf /dev/stderr /var/log/apache2/error.log
-
-# Configure PosgtreSQL
-COPY postgresql.custom.conf.tmpl /etc/postgresql/12/main/
-RUN chown -R postgres:postgres /var/lib/postgresql \
- && chown postgres:postgres /etc/postgresql/12/main/postgresql.custom.conf.tmpl \
- && echo "host all all 0.0.0.0/0 md5" >> /etc/postgresql/12/main/pg_hba.conf \
- && echo "host all all ::/0 md5" >> /etc/postgresql/12/main/pg_hba.conf
+&& ln -sf /dev/stderr /var/log/apache2/error.log
 
 # Copy update scripts
 COPY openstreetmap-tiles-update-expire /usr/bin/
 RUN chmod +x /usr/bin/openstreetmap-tiles-update-expire \
- && mkdir /var/log/tiles \
- && chmod a+rw /var/log/tiles \
- && ln -s /home/renderer/src/mod_tile/osmosis-db_replag /usr/bin/osmosis-db_replag \
- && echo "*  *    * * *   renderer    openstreetmap-tiles-update-expire\n" >> /etc/crontab
+&& mkdir /var/log/tiles \
+&& chmod a+rw /var/log/tiles \
+&& ln -s /home/renderer/src/mod_tile/osmosis-db_replag /usr/bin/osmosis-db_replag \
+&& echo "* * * * *   renderer    openstreetmap-tiles-update-expire\n" >> /etc/crontab
 
-# Install trim_osc.py helper script
-RUN mkdir -p /home/renderer/src \
- && cd /home/renderer/src \
- && git clone https://github.com/zverik/regional \
- && cd regional \
- && git checkout 889d630a1e1a1bacabdd1dad6e17b49e7d58cd4b \
- && rm -rf .git \
- && chmod u+x /home/renderer/src/regional/trim_osc.py
+RUN mkdir /nodes \
+&& chown renderer:renderer /nodes
+
+# Configure PosgtreSQL
+COPY postgresql.custom.conf.tmpl /etc/postgresql/12/main/
+RUN chown -R postgres:postgres /var/lib/postgresql \
+&& chown postgres:postgres /etc/postgresql/12/main/postgresql.custom.conf.tmpl \
+&& echo "host all all 0.0.0.0/0 md5" >> /etc/postgresql/12/main/pg_hba.conf \
+&& echo "host all all ::/0 md5" >> /etc/postgresql/12/main/pg_hba.conf
+
+###########################################################################################################
+
+FROM final-base AS final
+
+# Install PostGIS
+COPY --from=compiler-postgis postgis_src/postgis-src_3.1.1-1_amd64.deb .
+RUN dpkg -i postgis-src_3.1.1-1_amd64.deb \
+&& rm postgis-src_3.1.1-1_amd64.deb
+
+# Install osm2pgsql
+COPY --from=compiler-osm2pgsql /root/osm2pgsql/build/build_1-1_amd64.deb .
+RUN dpkg -i build_1-1_amd64.deb \
+&& rm build_1-1_amd64.deb
+
+# Install renderd
+COPY --from=compiler-modtile-renderd /root/mod_tile/renderd_1-1_amd64.deb .
+RUN dpkg -i renderd_1-1_amd64.deb \
+&& rm renderd_1-1_amd64.deb \
+&& sed -i 's/renderaccount/renderer/g' /usr/local/etc/renderd.conf \
+&& sed -i 's/\/truetype//g' /usr/local/etc/renderd.conf \
+&& sed -i 's/hot/tile/g' /usr/local/etc/renderd.conf
+
+# Install mod_tile
+COPY --from=compiler-modtile-renderd /root/mod_tile/mod-tile_1-1_amd64.deb .
+RUN dpkg -i mod-tile_1-1_amd64.deb \
+ && ldconfig \
+ && rm mod-tile_1-1_amd64.deb
+
+# Install stylesheet
+COPY --from=compiler-stylesheet /root/openstreetmap-carto /home/renderer/src/openstreetmap-carto
+
+# Install helper script
+COPY --from=compiler-helper-script /home/renderer/src/regional /home/renderer/src/regional
 
 # Start running
 COPY run.sh /
 ENTRYPOINT ["/run.sh"]
 CMD []
-
 EXPOSE 80 5432