redirect all php-fpm errors to stderr

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Container image version
 # Note: the version here is from `ELABIMG_VERSION` present in Dockerfile, not the tagged one
 
+# 4.6.2
+
+* Redirect all php-fpm error log to stderr
+
 # 4.6.1
 
 * Revert latest brotli code because new one makes nginx crash

Dockerfile

@@ -135,7 +135,7 @@ RUN abuild-keygen -n -a && abuild && find /home/builder/packages -type f -name '
 FROM alpine:3.18
 
 # this is versioning for the container image
-ENV ELABIMG_VERSION=4.6.1
+ENV ELABIMG_VERSION=4.6.2
 
 # the target elabftw version is passed with --build-arg
 # it is a mandatory ARG
@@ -212,6 +212,9 @@ RUN apk upgrade -U -a && apk add --no-cache \
 RUN mv /usr/bin/php81 /usr/bin/php81-real
 COPY ./src/php/phpwithenv /usr/bin/php81
 
+# redirect all the php-fpm errors to stderr
+RUN ln -sf /dev/stderr /var/log/php81/error.log
+
 # S6-OVERLAY
 # install s6-overlay, our init system. Workaround for different versions using TARGETPLATFORM
 # platform see https://docs.docker.com/engine/reference/builder/#automatic-platform-args-in-the-global-scope