build(docker): add healthcheck ping endpoint

Author: MartinPaulEve

Dockerfile.php

@@ -161,5 +161,8 @@
         > /app/site/web/.version.json && \
     chown www-data:www-data /app/site/web/.version.json
 
+# used for health check endpoint
+RUN apk add --no-cache fcgi
+
 ENTRYPOINT ["/app/scripts/build-scripts/docker-php-entrypoint.sh"]
 CMD ["php-fpm"]

config/all/php/www.conf

@@ -9,4 +9,6 @@ pm.max_children = ${PM_MAX_CHILDREN}
 pm.start_servers = ${PM_START_SERVERS}
 pm.min_spare_servers = ${PM_MIN_SPARE_SERVERS}
 pm.max_spare_servers = ${PM_MAX_SPARE_SERVERS}
-pm.max_requests = ${PM_MAX_REQUESTS}
+pm.max_requests = ${PM_MAX_REQUESTS}
+ping.path = /ping
+ping.response = pong