[docker-rainloop] Install apcu

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 1f8b11a19154d60170e82410987ab2ff6b144b97
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Thu Feb 3 11:47:09 2022 +0100

    Install apcu

 Dockerfile | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index 94aa828..ef76a07 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,7 @@
 FROM php:7-apache
 
-RUN apt-get update && apt-get install -y libpq-dev && \
-    docker-php-ext-configure pgsql && \
-    docker-php-ext-install pdo pdo_pgsql pgsql
+RUN pecl install apcu && \
+    docker-php-ext-enable apcu
 
 SHELL ["/bin/bash", "-c"]