Harden hosted DB env wiring and runtime bootstrap

Dockerfile

@@ -15,9 +15,12 @@ COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
 WORKDIR /var/www
 
 COPY . .
+COPY docker/entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
 
 RUN composer install --no-dev --optimize-autoloader
 
 EXPOSE 80
 
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
 CMD ["php", "-S", "0.0.0.0:80", "-t", "public"]