Process code review feedback

Remove unneeded IF statement in /admin block in nginx.conf of front.
Fix contributions made to Dockerfile, add missing trailing \ and add back curl
Change healthcheck to monitoring page of fpm. Now we check nginx and fpm.

core/nginx/conf/nginx.conf

@@ -213,9 +213,6 @@ http {
       {% endif %}
       {% if ADMIN == 'true' %}
        location {{ WEB_ADMIN }} {
-         {% if WEB_ADMIN != '/' %}
-         rewrite ^({{ WEB_ADMIN }})$ $1/ permanent;
-         {% endif %}
          include /etc/nginx/proxy.conf;
          proxy_pass http://$admin;
          expires $expires;

webmails/snappymail/Dockerfile

@@ -43,7 +43,7 @@ RUN apk add --no-cache \
 #     zip               php7-zip
 #php7-curl php7-iconv php7-json php7-xml php7-simplexml php7-dom php7-openssl php7-pdo php7-pdo_sqlite php7-mbstring \
 RUN apk add --no-cache \
-    nginx \
+    nginx curl \
     php7 php7-fpm php7-mbstring php7-zip php7-json php7-xml php7-simplexml \
     php7-dom php7-curl php7-exif gd php7-gd php7-iconv php7-intl php7-openssl \
     php7-pdo_sqlite php7-pdo php7-sodium libsodium php7-tidy php7-pecl-uuid \
@@ -66,7 +66,7 @@ COPY defaults/default.ini /defaults/default.ini
 ENV SNAPPYMAIL_URL https://github.com/the-djmaze/snappymail/releases/download/v2.13.4/snappymail-2.13.4.zip
 
 RUN cd /var/www/webmail \
- && busybox wget ${SNAPPYMAIL_URL} -O - |busybox unzip -
+ && busybox wget ${SNAPPYMAIL_URL} -O - | busybox unzip - \
  && chmod -R u+w,a+rX /var/www/webmail \
  && chown -R nginx:nginx /var/www/webmail
 
@@ -82,5 +82,5 @@ VOLUME ["/data"]
 
 CMD /start.py
 
-HEALTHCHECK CMD curl -f -L http://localhost/health || exit 1
+HEALTHCHECK CMD curl -f -L http://localhost/ping || exit 1
 RUN echo $VERSION >> /version

webmails/snappymail/config/nginx-snappymail.conf

@@ -22,10 +22,12 @@ server {
     }
 
     location ~ \.php$ {
+        fastcgi_split_path_info ^(.+?\.php)(/.*)$;
+        if (!-f $document_root$fastcgi_script_name) {
+            return 404;
+        }
         include /etc/nginx/fastcgi_params;
 
-        fastcgi_split_path_info ^(.+\.php)(/.*)$;
-
         fastcgi_intercept_errors on;
         fastcgi_index  index.php;
 
@@ -48,8 +50,13 @@ server {
        deny all;
     }
 
-    location /health {
-        add_header Content-Type text/plain;
-        return 200;
+    location = /ping {
+        allow 127.0.0.1;
+        deny all;
+
+        include /etc/nginx/fastcgi_params;
+        fastcgi_index index.php;
+        fastcgi_pass unix:/var/run/php7-fpm.sock;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
     }
 }

webmails/snappymail/config/php-snappymail.conf

@@ -99,3 +99,20 @@ pm.process_idle_timeout = 10s
 ; Equivalent to PHP_FCGI_MAX_REQUESTS. Default value: 0.
 ; Noted: Used only when pm is set to 'ondemand'
 pm.max_requests = 200
+
+; The ping URI to call the monitoring page of FPM. If this value is not set, no
+; URI will be recognized as a ping page. This could be used to test from outside
+; that FPM is alive and responding, or to
+; - create a graph of FPM availability (rrd or such);
+; - remove a server from a group if it is not responding (load balancing);
+; - trigger alerts for the operating team (24/7).
+; Note: The value must start with a leading slash (/). The value can be
+;       anything, but it may not be a good idea to use the .php extension or it
+;       may conflict with a real PHP file.
+; Default Value: not set
+ping.path = /ping
+
+; This directive may be used to customize the response of a ping request. The
+; response is formatted as text/plain with a 200 response code.
+; Default Value: pong
+;ping.response = pong