php-fpm: preinstall wp-cli, add WP-independent healthcheck

php-fpm/7.4/Dockerfile

@@ -27,6 +27,7 @@ RUN set -eux; \
 	# Install runtime dependencies
 	apk add --no-cache \
 	bash \
+	curl \
 	freetype \
 	libjpeg-turbo \
 	libpng \
@@ -67,6 +68,10 @@ RUN set -eux; \
 	# Use production php.ini
 	cp "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"; \
 	\
+	# Install WP-CLI for remedial administration
+	curl -fSL https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar -o /usr/local/bin/wp; \
+	chmod +x /usr/local/bin/wp; \
+	\
 	# Clean up build dependencies
 	apk del .build-deps; \
 	rm -rf /var/cache/apk/* /tmp/*
@@ -85,6 +90,10 @@ COPY php-fpm/conf.d/ /usr/local/etc/php/conf.d/
 # Copy the force-debug script (enablement is handled via conf.d/99-force-debug.ini)
 COPY --chown=app:app shared/php-fpm/force-debug.php /usr/local/etc/php/force-debug.php
 
+# Copy shared healthcheck assets
+RUN mkdir -p /usr/local/share/auvem/health
+COPY shared/php-fpm/healthcheck.php /usr/local/share/auvem/health/healthcheck.php
+
 # Copy pool configuration from this directory
 COPY --chown=app:app php-fpm/${BASE_VERSION}/www.conf /usr/local/etc/php-fpm.d/www.conf
 # Copy the global php-fpm configuration so logging defaults are predictable