Add licenses to container image (#146)

.dockerignore

@@ -2,10 +2,11 @@
 **
 
 # ... except for dependencies and source
+!costemailer/
+!LICENSE
 !Pipfile
 !Pipfile.lock
 !send_email.py
-!costemailer/
 
 # keep the test files out of the final image
 **/*test*

Dockerfile

@@ -71,6 +71,8 @@ ENV \
 COPY costemailer costemailer
 COPY send_email.py .
 
+COPY LICENSE /licenses/MIT.txt
+
 # create the koku user
 RUN \
     adduser koku -u ${USER_ID} -g 0 && \