prometheus-php-fpm-exporter: Bullseye update and fix build script

The original repo hasn't been updated in 9 months and contains a bug
breaking the build (see
bakins/php-fpm-exporter#48)

Use a fixed fork (https://github.com/olivierbeytrison/php-fpm-exporter)

Upgrade image to bullseye, build image to golang1.15

Change-Id: Ic22672202b9a573a3d12323f220d0554168e7bb7

Author: cgoubert

images/prometheus-exporters/php-fpm/Dockerfile.template

@@ -1,15 +1,14 @@
-FROM {{ "golang" | image_tag }} as build
-USER root
-RUN {{ "upx-ucl" | apt_install }}
-USER nobody
-RUN go get -d github.com/bakins/php-fpm-exporter && cd /go/src/github.com/bakins/php-fpm-exporter && \
-   GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" ./cmd/php-fpm-exporter && \
-   upx --brute php-fpm-exporter && cp php-fpm-exporter /go/bin
+FROM {{ "golang1.15" | image_tag }} as build
+ENV SOURCE_REPO=https://github.com/olivierbeytrison/php-fpm-exporter
 
+USER nobody
+RUN git clone $SOURCE_REPO && \
+    cd php-fpm-exporter && \
+    ./script/build
 
 FROM {{ registry }}/wikimedia-buster:latest
 
-COPY --from=build /go/bin/php-fpm-exporter /usr/bin/prometheus-php-fpm-exporter
+COPY --from=build /go/php-fpm-exporter/php-fpm-exporter.linux.amd64 /usr/bin/prometheus-php-fpm-exporter
 
 USER {{ "nobody" | uid }}
 ENTRYPOINT ["/usr/bin/prometheus-php-fpm-exporter"]

images/prometheus-exporters/php-fpm/changelog

@@ -1,3 +1,11 @@
+prometheus-php-fpm-exporter (0.0.3) wikimedia; urgency=high
+
+  * Use upstream build script
+  * Switch to olivierbeytrison's fork that fixes build process
+  * Update to bullseye
+
+ -- Clément Goubert <Clément Goubert <[email protected]>>  Mon, 11 Dec 2023 14:34:04 +0100
+
 prometheus-php-fpm-exporter (0.0.2-20231210) wikimedia; urgency=medium
 
   * Weekly rebuild.

images/prometheus-exporters/php-fpm/control

@@ -1,3 +1,4 @@
 Package: prometheus-php-fpm-exporter
 Description: php-fpm prometheus exporter
 Maintainer: Giuseppe Lavagetto <[email protected]>
+Build-Depends: golang1.15