Typo and documentation fixes in the Dockerfile

Author: bryk

src/app/deploy/Dockerfile

@@ -15,16 +15,16 @@
 # Main Dockerfile of the project. It creates an image that serves the application. This image should
 # be built from the dist directory.
 
-# Scratch can be used as a base image because the backend is compiled to include all
+# Scratch can be used as the base image because the backend is compiled to include all
 # its dependencies. 
 FROM scratch
 MAINTAINER Piotr Bryk <[email protected]>
 
-# Add all files from current working directory to the root of the image, i.e., copy dist cirectory
+# Add all files from current working directory to the root of the image, i.e., copy dist directory
 # layout to the root directory.
 ADD . /
 
 # The port that the application listens on.
-# TODO(bryk): Parametrize this.
+# TODO(bryk): Parametrize this argument so that other build tools are aware of the exposed port.
 EXPOSE 8080
 ENTRYPOINT ["/console"]