diff --git a/Dockerfile b/Dockerfile
index 8985435..2b27532 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,8 +36,8 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
 
 # add ttrss as the only nginx site
 ADD ttrss.nginx.conf /etc/nginx/sites-available/ttrss
-RUN ln -s /etc/nginx/sites-available/ttrss /etc/nginx/sites-enabled/ttrss
-RUN rm /etc/nginx/sites-enabled/default
+RUN ln -s /etc/nginx/sites-available/ttrss /etc/nginx/sites-enabled/ttrss \
+  && rm /etc/nginx/sites-enabled/default
 
 # install ttrss and patch configuration
 WORKDIR /var/www
@@ -54,17 +54,6 @@ RUN cp config.php-dist config.php \
     && chown www-data:www-data -R /var/www \
     && mkdir -p /var/run/php
 
-# expose only nginx HTTP port
-EXPOSE 80
-
-# complete path to ttrss
-ENV SELF_URL_PATH http://localhost
-
-# expose default database credentials via ENV in order to ease overwriting
-ENV DB_NAME ttrss
-ENV DB_USER ttrss
-ENV DB_PASS ttrss
-
 # always re-configure database with current ENV when RUNning container, then monitor all services
 ADD configure-db.php /configure-db.php
 ADD supervisord.conf /etc/supervisor/conf.d/supervisord.conf