Skip OPcache build on PHP 8.5 website image

apps/website/Dockerfile

@@ -10,10 +10,19 @@ RUN apk add --no-cache \
       $PHPIZE_DEPS \
       curl-dev \
       sqlite-dev && \
-    docker-php-ext-install \
-      curl \
-      opcache \
-      pdo_sqlite && \
+    install_php_extension() { \
+      extension="$1"; \
+      if php -m | grep -Eiq "^${extension}$"; then \
+        echo "${extension} already enabled"; \
+      else \
+        docker-php-ext-install "${extension}"; \
+      fi; \
+    } && \
+    install_php_extension curl && \
+    install_php_extension pdo_sqlite && \
+    php -m | grep -Eiq '^curl$' && \
+    php -m | grep -Eiq '^pdo_sqlite$' && \
+    php -m | grep -Eiq 'opcache' && \
     apk del .build-deps
 
 RUN set -eu; \