STA-929 | Добавил Dockerfile

docker/Dockerfile

+FROM php:fpm-alpine
+
+WORKDIR "/app"
+
+COPY .. .
+
+RUN set -ex \
+  && apk --no-cache add \
+    postgresql-dev
+
+RUN docker-php-ext-install pdo pdo_pgsql
+
+ENV COMPOSER_ALLOW_SUPERUSER=1
+
+RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+
+RUN composer install
+
+CMD ["php-fpm"]