diff --git a/Dockerfile b/Dockerfile
index 9310d5f..387f948 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-# Using https://github.com/gliderlabs/docker-alpine, which in turn
-# plus  https://github.com/just-containers/s6-overlay for a s6 Docker overlay
+# Using https://github.com/gliderlabs/docker-alpine,
+# plus  https://github.com/just-containers/s6-overlay for a s6 Docker overlay.
 FROM gliderlabs/alpine
-# Initially was based on work of Christian Lück <christian@lueck.tv>
+# Initially was based on work of Christian Lück <christian@lueck.tv>.
 LABEL description="A complete, self-hosted Tiny Tiny RSS (TTRSS) environment." \
       maintainer="Andreas Löffler <andy@x86dev.com>"
 
@@ -12,30 +12,30 @@ RUN set -xe && \
     php5 php5-fpm php5-curl php5-dom php5-gd php5-json php5-mcrypt php5-pcntl \
     php5-pdo php5-pdo_pgsql php5-pgsql php5-pdo_mysql php5-mysql php5-mysqli php5-posix
 
-# Add user www-data for php-fpm
-# 82 is the standard uid/gid for "www-data" in Alpine
+# Add user www-data for php-fpm.
+# 82 is the standard uid/gid for "www-data" in Alpine.
 RUN adduser -u 82 -D -S -G www-data www-data
 
-# Copy root file system
+# Copy root file system.
 COPY root /
 
-# Add s6 overlay
-# Note: Tweak this line if you're running anything other than x86 AMD64 (64-bit)
+# Add s6 overlay.
+# Note: Tweak this line if you're running anything other than x86 AMD64 (64-bit).
 RUN curl -L -s https://github.com/just-containers/s6-overlay/releases/download/v1.19.1.1/s6-overlay-amd64.tar.gz | tar xvzf - -C /
 
-# expose Nginx ports
+# Expose Nginx ports.
 EXPOSE 8080
 EXPOSE 4443
 
-# expose default database credentials via ENV in order to ease overwriting
+# Expose default database credentials via ENV in order to ease overwriting.
 ENV DB_NAME ttrss
 ENV DB_USER ttrss
 ENV DB_PASS ttrss
 
-# only run the setup once
+# Only run the setup once.
 RUN set -xe && /srv/setup-ttrss.sh
 
-# clean up
+# Clean up.
 RUN set -xe && apk del --progress --purge && rm -rf /var/cache/apk/*
 
 ENTRYPOINT ["/init"]