Consolidation of Dockerfile, reduced layer size.

Dockerfile

@@ -12,6 +12,15 @@ ENV NODE_MAJOR=20
 
 #### Common setup ####
 
+# Old-releases for 21.04
+COPY sources.list /etc/apt/sources.list
+
+# Create and change into working directory
+WORKDIR $WORKDIR
+
+# Install Python deps -- install & remove cleanup build-only deps in the process
+COPY requirements.txt ./
+
 # Common system configuration, should change very infrequently
 RUN \
     # Default to 3 retries for apt-get acquire's.
@@ -19,49 +28,42 @@ RUN \
     # Ref: https://askubuntu.com/questions/875213/apt-get-to-retry-downloading
     echo 'Acquire::Retries "3";' > /etc/apt/apt.conf.d/80-retries && \
     # Set timezone to UTC
-    echo "UTC" > /etc/timezone
-
-# Old-releases for 21.04
-COPY sources.list /etc/apt/sources.list
-
-# Build-time dependencies
-RUN apt-get -qq update && \
+    echo "UTC" > /etc/timezone && \
+    # Build-time dependencies
+    apt-get -qq update && \
     apt-get -qq install -y --no-install-recommends curl && \
-    apt-get install -y ca-certificates gnupg
-
-# Node.js deb source
-RUN mkdir -p /etc/apt/keyrings && \
+    apt-get install -y ca-certificates gnupg && \
+    # Node.js deb source
+    mkdir -p /etc/apt/keyrings && \
     curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg && \
     echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list && \
+    # Update package list
     apt-get -qq update && \
-    apt-get -qq install -y nodejs
-
-# Install Python3, GDAL, PDAL, nginx, letsencrypt, psql
-RUN apt-get -qq update && \
-    apt-get -qq install -y --no-install-recommends python3 python3-pip python3-setuptools python3-wheel git g++ python3-dev python2.7-dev libpq-dev binutils libproj-dev gdal-bin pdal libgdal-dev python3-gdal nginx certbot gettext-base cron postgresql-client-13 gettext tzdata && \
+    # Install common deps, starting with NodeJS
+    apt-get -qq install -y nodejs && \
+    # Python3, GDAL, PDAL, nginx, letsencrypt, psql
+    apt-get -qq install -y --no-install-recommends python3 python3-pip python3-setuptools python3-wheel git python2.7-dev binutils libproj-dev gdal-bin pdal libgdal-dev python3-gdal nginx certbot gettext-base cron postgresql-client-13 gettext tzdata && \
     # Python2 with priority 1
     update-alternatives --install /usr/bin/python python /usr/bin/python2.7 1 && \
     # Python3 with priority 2 (default)
     update-alternatives --install /usr/bin/python python /usr/bin/python3.9 2 && \
     # Install pip
-    pip install pip==24.0
-
-#### App-dependent setup ####
-
-# Create and change into working directory
-WORKDIR $WORKDIR
-
-# Install Python requirements
-COPY requirements.txt ./
-RUN pip install -r requirements.txt "boto3==1.14.14"
-
-# Cleanup of build requirements
-RUN apt-get remove -y g++ python3-dev libpq-dev && apt-get autoremove -y && \
-    apt-get clean && rm -rf /var/lib/apt/lists/*
-
-# Setup cron
-COPY --chmod=0644 nginx/crontab ./nginx/crontab
-RUN ln -s ./nginx/crontab /var/spool/cron/crontabs/root
+    pip install pip==24.0 && \
+    # Install webpack, webpack CLI
+    # Note webpack CLI is also used in `rebuildplugins` below
+    npm install --quiet -g webpack@5.89.0 && \
+    npm install --quiet -g webpack-cli@5.1.4 && \
+    # Build-only deps
+    apt-get -qq install -y --no-install-recommends g++ python3-dev libpq-dev && \
+    # Install Python requirements
+    pip install -r requirements.txt "boto3==1.14.14" && \
+    # Cleanup of build requirements
+    apt-get remove -y g++ python3-dev libpq-dev && \
+    apt-get autoremove -y && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/* && \
+    # Remove stale temp files
+    rm -rf /tmp/* /var/tmp/*
 
 # Install project Node dependencies
 COPY package.json ./
@@ -70,24 +72,23 @@ RUN npm install --quiet
 # Copy remaining files
 COPY . ./
 
-# NodeODM setup
-RUN chmod +x ./nginx/letsencrypt-autogen.sh && \
+# Final build steps (in one roll to prevent too many layers).
+RUN \
+    # Setup cron
+    chmod 0644 ./nginx/crontab && \
+    ln -s ./nginx/crontab /var/spool/cron/crontabs/root && \
+    # NodeODM setup
+    chmod +x ./nginx/letsencrypt-autogen.sh && \
     ./nodeodm/setup.sh && \
-    ./nodeodm/cleanup.sh
-
-# Install and run webpack build
-# Note webpack CLI is also used in `rebuildplugins` below
-RUN npm install --quiet -g webpack@5.89.0 && \
-    npm install --quiet -g webpack-cli@5.1.4 && \
-    webpack --mode production
-
-# Django setup
-RUN python manage.py collectstatic --noinput && \
+    ./nodeodm/cleanup.sh \
+    # Run webpack build, Django setup and final cleanup
+    webpack --mode production \
+    # Django setup
+    python manage.py collectstatic --noinput && \
     python manage.py rebuildplugins && \
-    python manage.py translate build --safe
-
-# Final cleanup
-RUN rm -rf /tmp/* /var/tmp/* && \
+    python manage.py translate build --safe && \
+    # Final cleanup
+    rm -rf /tmp/* /var/tmp/* && \
     # Remove auto-generated secret key (happens on import of settings when none is defined)
     rm /webodm/webodm/secret_key.py