adding RemoteIPHeader config

Dockerfile

@@ -15,6 +15,7 @@ RUN apt update &&\
     git clone --depth 1 --recurse-submodules https://github.com/acdh-oeaw/aksearch.git /usr/local/vufind &&\
     ### Apache \
     a2enmod rewrite &&\
+    a2enmod remoteip &&\
     ln -s /var/www/local/config/vufind/httpd-vufind.conf /etc/apache2/conf-enabled/vufind.conf &&\
     sed -i '/^<\/Location>/i #SetEnv APPLICATION_ENV ""' /etc/apache2/conf-enabled/vufind.conf &&\
     # environment variables are set by the start.sh script (which allows setting them by `docker run`) \
@@ -33,7 +34,7 @@ COPY harvest_degruyter.sh /var/www/vufind/harvest/harvest_degruyter.sh
 COPY health_check_and_harvest.sh /var/www/vufind/harvest/health_check_and_harvest.sh
 ### AkSearch config tuning which can be done as a www-data user
 USER www-data
-RUN cd /usr/local/vufind &&\ 
+RUN cd /usr/local/vufind &&\
     # remove automatic installation of solr and swaggerui \
     sed -i -e '/phing-install-dependencies/d' composer.json &&\
     # for composer v2 compatibility \

local/config/vufind/httpd-vufind.conf

@@ -54,6 +54,9 @@ AliasMatch ^/resources/cache/(.*)$ /usr/local/vufind/local/cache/public/$1
 # Configuration for general VuFind base:
 Alias /resources /usr/local/vufind/public
 <Directory /usr/local/vufind/public/>
+  <IfModule mod_remoteip.c>
+    RemoteIPHeader X-Forwarded-For
+  </IfModule>
   <If "%{HTTP_USER_AGENT} =~ /bytedance/">
     Require all denied
   </If>