Improve container config, entrypoint etc

docker/entrypoint.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+echo >&2 "-------------------------------------------------------------"
+
+echo >&2 "- Repopulating web root with application files."
+if [ "$(ls -A /var/www/html)" ]; then
+    rm /var/www/html/* -r
+fi
+cp /usr/src/jumpapp/* /var/www/html -r
+
+echo >&2 "- Check if backgrounds or sites volumes have been mounted."
+if [ -e "/backgrounds" ]; then
+    echo >&2 "   - Backgrounds directory is mapped... symlinking."
+    rm /var/www/html/assets/backgrounds -r
+    ln -s /backgrounds /var/www/html/assets/
+    if [ ! "$(ls -A /backgrounds)" ]; then
+        echo >&2 "     -- Empty so populating with default files."
+        cp /usr/src/jumpapp/assets/backgrounds/* /backgrounds -r
+    fi
+fi
+
+if [ -e "/sites" ]; then
+    echo >&2 "   - Sites directory is mapped... symlinking."
+    rm /var/www/html/sites -r
+    ln -s /sites /var/www/html/
+    if [ ! "$(ls -A /sites)" ]; then
+        echo >&2 "     -- Empty so populating with default files."
+        cp /usr/src/jumpapp/sites/* /sites -r
+    fi
+fi
+
+echo >&2 "- All done! Starting nginx/php services now."
+echo >&2 "-------------------------------------------------------------"
+
+php-fpm8
+nginx -g 'daemon off;'