Fix rate limiter configuration

This reverts commit e62b953a1b.

Dockerfile

@@ -1,6 +1,7 @@
 # Install Caddy
 FROM docker.io/caddy:builder-alpine AS caddy-builder
-RUN xcaddy build
+RUN xcaddy build \
+    --with github.com/mholt/caddy-ratelimit
 
 
 # Install PHP
@@ -55,8 +56,8 @@ RUN mkdir /.config /phpbb
 COPY src/ /var/www/html/
 
 # Add phpBB installation
-ENV PHPBB_VERSION=3.3.14
+ENV PHPBB_VERSION=3.3.15
-ENV PHPBB_SHA256=68cd6cf3faefa175ea3892ba02c6b112e8967ed33703521c79820e35bd15ec9a
+ENV PHPBB_SHA256=b4a1d0b579651dcdd55f02c0b742d23fb5d45f915de60628d5aadd34d32cf761
 
 WORKDIR /tmp
 

config/Caddyfile

@@ -6,6 +6,17 @@
 }
 
 :8080 {
+    rate_limit {
+        distributed
+        zone dynamic {
+            key    {client_ip}
+            events 20
+            window 5s
+            jitter 0.1
+        }
+        log_key
+    }
+
     root * /phpbb/www
 
     php_fastcgi unix//run/php-fpm.sock {