Add memcached extension

Dockerfile

@@ -329,6 +329,31 @@ RUN set -eux; \
     echo 'date.timezone=Asia/Bangkok'; \
   } | tee /usr/local/etc/php/conf.d/core.ini;
 
+# install php-memcached
+RUN set -eux; \
+    apt-get update; \
+    apt-get install -y --no-install-recommends \
+      libmemcached-dev \
+      libz-dev \
+    ; \
+    apt-get clean; \
+    rm -rf /var/lib/apt/lists/*
+
+RUN set -eux; \
+    cd /tmp; \
+    curl -JLO https://github.com/php-memcached-dev/php-memcached/archive/refs/tags/2.2.0.tar.gz; \
+    tar xpf php-memcached-2.2.0.tar.gz; \
+    cd php-memcached-2.2.0; \
+    phpize; \
+    ./configure; \
+    make install; \
+    cd /tmp; \
+    rm -rf php-memcached-2.2.0.tar.gz php-memcached-2.2.0
+
+RUN set -eux; \
+  { \
+    echo 'extension=memcached.so'; \
+  } | tee /usr/local/etc/php/conf.d/memcached.ini;
 # install phpredis
 RUN set -eux; \
     PHPREDIS_VERSION="2.2.8"; \