diff --git a/README.md b/README.md
index 72c2ce8..76d34e6 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,11 @@
 
 This software generates random codenames for projects.
 
+I have intentionally excluded words that are long, confusing, hard to spell,
+as well as occupations, animal names with negative connotations, and some
+foods and body parts in an attempt to avoid randomly generating negative,
+threatening, or disgusting code names.
+
 # See Also
 
 [docker
diff --git a/heroku.yml b/heroku.yml
new file mode 100644
index 0000000..8eec25b
--- /dev/null
+++ b/heroku.yml
@@ -0,0 +1,3 @@
+build:
+  docker:
+    web: Dockerfile