Provide a development Dockerfile that extends the base farmOS image.

docker/dev/Dockerfile

@@ -0,0 +1,28 @@
+# Inherit from the farmOS 7.x-1.x image.
+FROM farmos/farmos:7.x-1.x
+
+# Set the farmOS version to the development branch.
+ENV FARMOS_VERSION 7.x-1.x
+
+# Install git and unzip for use by Drush Make.
+RUN apt-get update && apt-get install -y git unzip
+
+# Install Drush 8 with the phar file.
+ENV DRUSH_VERSION 8.2.1
+RUN curl -fsSL -o /usr/local/bin/drush "https://github.com/drush-ops/drush/releases/download/${DRUSH_VERSION}/drush.phar" && \
+  chmod +x /usr/local/bin/drush && \
+  drush core-status
+
+# Install mariadb-client so Drush can connect to the database.
+RUN apt-get update && apt-get install -y mariadb-client
+
+# Build the farmOS repository in /tmp/farmOS.
+RUN git clone --branch ${FARMOS_VERSION} https://git.drupal.org/project/farm.git /tmp/farmOS && \
+  drush make --working-copy --no-gitinfofile /tmp/farmOS/build-farm.make /tmp/www && \
+  chown -R www-data:www-data /tmp/www
+
+# Set the entrypoint.
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN chmod u+x /usr/local/bin/docker-entrypoint.sh
+ENTRYPOINT ["docker-entrypoint.sh"]
+CMD ["apache2-foreground"]

docker/dev/docker-entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+set -e
+
+# If the webroot directory is empty, copy from /tmp/www.
+if ! [ "$(ls -A /var/www/html/)" ]; then
+  cp -rp /tmp/www/. /var/www/html
+fi
+
+# Execute the arguments passed into this script.
+echo "Attempting: $@"
+exec "$@"

docker/docker-compose.development.yml

@@ -15,7 +15,7 @@ services:
   www:
     depends_on:
       - db
-    image: farmos/farmos:7.x-1.x
+    image: farmos/farmos:dev
     volumes:
       - './www:/var/www/html'
     ports: