Add multi_coop configuration via environment variable in docker setup

If the file app_config.defaults.yml exists in the working directory,
the content will be written to the config/app_config.yml and appended
by a configuration entry for every foodcoop in the space separated
environment variable FOODSOFT_FOODCOOPS.

Dockerfile

@@ -39,14 +39,15 @@ RUN export DATABASE_URL=mysql2://localhost/temp?encoding=utf8 && \
     cp config/app_config.yml.SAMPLE config/app_config.yml && \
     cp config/database.yml.MySQL_SAMPLE config/database.yml && \
     bundle exec rake db:setup assets:precompile && \
-    rm -Rf config/app_config.yml tmp/* && \
+    rm -Rf tmp/* && \
     /etc/init.d/mysql stop && \
     rm -Rf /run/mysqld /tmp/* /var/tmp/* /var/lib/mysql /var/log/mysql* && \
     apt-get purge -y --auto-remove mariadb-server && \
     rm -Rf /var/lib/apt/lists/* /var/cache/apt/*
 
-# Make relevant dirs writable for app user
+# Make relevant dirs and files writable for app user
 RUN mkdir -p tmp && \
+    chown nobody config/app_config.yml && \
     chown nobody tmp
 
 # Run app as unprivileged user

docker-entrypoint.sh

@@ -6,4 +6,17 @@ if [ -f tmp/pids/server.pid ]; then
   rm tmp/pids/server.pid
 fi
 
+if [ -e app_config.defaults.yml ] ; then
+  cat app_config.defaults.yml > config/app_config.yml
+
+  for FOODCOOP in $FOODSOFT_FOODCOOPS; do
+    cat << EOF >> config/app_config.yml
+$FOODCOOP:
+  <<: *defaults
+  database:
+    database: foodsoft_$FOODCOOP
+EOF
+  done
+fi
+
 exec "$@"