fix: add ext-soap to Dockerfile and composer.json to resolve SoapClient not found error in production

Dockerfile

@@ -63,8 +63,8 @@ RUN set -eu; \
     export MAKEFLAGS="-j$(nproc)"; \
     retry() { for i in 1 2 3 4 5; do "$@" && return 0; echo "retry $i: $*"; sleep 5; done; return 1; }; \
     retry apk add --no-cache nginx supervisor icu-libs \
- && retry apk add --no-cache --virtual .build-deps $PHPIZE_DEPS icu-dev \
- && docker-php-ext-install pdo_mysql intl opcache \
+ && retry apk add --no-cache --virtual .build-deps $PHPIZE_DEPS icu-dev libxml2-dev \
+ && docker-php-ext-install pdo_mysql intl opcache soap \
  && retry curl -sSLf "https://github.com/phpredis/phpredis/archive/refs/tags/${PHPREDIS_VERSION}.tar.gz" -o /tmp/phpredis.tar.gz \
  && mkdir -p /usr/src/php/ext/redis \
  && tar -xf /tmp/phpredis.tar.gz -C /usr/src/php/ext/redis --strip-components=1 \