fix issue with CIDR notation for SET_REAL_IP_FROM env var

the slash was causing an issue with sed

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Container image version
 # Note: the version here is from `ELABIMG_VERSION` present in Dockerfile, not the tagged one
 
+# 4.4.1
+
+* Fix `set_real_ip` nginx module not working with CIDR notation
+
 # 4.4.0
 
 * Configure nginx to serve only to whitelisted paths for php

Dockerfile

@@ -127,7 +127,7 @@ RUN abuild-keygen -n -a && abuild && find /home/builder/packages -type f -name '
 FROM alpine:3.16
 
 # this is versioning for the container image
-ENV ELABIMG_VERSION=4.4.0
+ENV ELABIMG_VERSION=4.4.1
 
 # the target elabftw version is passed with --build-arg
 # it is a mandatory ARG

src/init/prepare.sh

@@ -164,7 +164,8 @@ nginxConf() {
         do
             conf_string+="set_real_ip_from ${element};"
         done
-        sed -i -e "s/#%REAL_IP_CONF%/${conf_string}/" /etc/nginx/common.conf
+        # use pipe for sed separation because CIDR might have a /
+        sed -i -e "s|#%REAL_IP_CONF%|${conf_string}|" /etc/nginx/common.conf
         # enable real_ip_header config
         sed -i -e "s/#real_ip_header X-Forwarded-For;/real_ip_header X-Forwarded-For;/" /etc/nginx/common.conf
     fi