fixed log forwarding (taken from original nginx image)

nginx/Dockerfile-fpm-alpine-nginx

@@ -11,6 +11,10 @@ RUN apk --update add nginx
 COPY image-files/ /
 RUN chown -R www-data:www-data /var/lib/nginx/
 
+# forward request and error logs to docker log collector
+RUN ln -sf /dev/stdout /var/log/nginx/access.log \
+ && ln -sf /dev/stderr /var/log/nginx/error.log
+
 CMD ["forego", "start", "-r", "-f", "/root/Procfile"]
 
 EXPOSE 80 443
\ No newline at end of file

nginx/Dockerfile-fpm-nginx

@@ -16,6 +16,10 @@ RUN apt-get update \
 # Add configuration files
 COPY image-files/ /
 
+# forward request and error logs to docker log collector
+RUN ln -sf /dev/stdout /var/log/nginx/access.log \
+ && ln -sf /dev/stderr /var/log/nginx/error.log
+
 CMD ["forego", "start", "-r", "-f", "/root/Procfile"]
 
 EXPOSE 80 443