diff --git a/.env.production.sample b/.env.production.sample
index 44ca984b8..d7c04e235 100644
--- a/.env.production.sample
+++ b/.env.production.sample
@@ -29,6 +29,7 @@ OTP_SECRET=
 # DEFAULT_LOCALE=de
 
 # E-mail configuration
+# Note: Mailgun and SparkPost (https://sparkpo.st/smtp) each have good free tiers
 SMTP_SERVER=smtp.mailgun.org
 SMTP_PORT=587
 SMTP_LOGIN=
diff --git a/Dockerfile b/Dockerfile
index c28287cca..57a8f34e9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,7 +29,8 @@ RUN BUILD_DEPS=" \
  && npm install -g npm@3 && npm install -g yarn \
  && bundle install --deployment --without test development \
  && yarn \
- && npm cache clean \
+ && yarn cache clean \
+ && npm -g cache clean \
  && apk del $BUILD_DEPS \
  && rm -rf /tmp/* /var/cache/apk/*
 
diff --git a/docs/Running-Mastodon/Administration-guide.md b/docs/Running-Mastodon/Administration-guide.md
index dd69eb303..09b0f1df1 100644
--- a/docs/Running-Mastodon/Administration-guide.md
+++ b/docs/Running-Mastodon/Administration-guide.md
@@ -7,7 +7,7 @@ So, you have a working Mastodon instance... now what?
 
 The following rake task:
 
-    rake mastodon:make_admin USERNAME=alice
+    RAILS_ENV=production bundle exec rails mastodon:make_admin USERNAME=alice
 
 Would turn the local user "alice" into an admin.
 
diff --git a/docs/Running-Mastodon/Heroku-guide.md b/docs/Running-Mastodon/Heroku-guide.md
index 16f6930e4..4978a20ac 100644
--- a/docs/Running-Mastodon/Heroku-guide.md
+++ b/docs/Running-Mastodon/Heroku-guide.md
@@ -81,8 +81,6 @@ You can deploy from the Heroku web interface or from the command line. Run:
 
 after you first deploy to set up the first database.
 
-You may need to use the `heroku` CLI application to run:
+To make yourself an admin, you may need to use the `heroku` CLI application after creating an account online:
 
-  `USERNAME=yourUsername rails mastodon:make_admin`
-
-to make yourself an admin.
+  `heroku rake mastodon:make_admin USERNAME=yourUsername`
diff --git a/docs/Using-Mastodon/Apps.md b/docs/Using-Mastodon/Apps.md
index 67b14dc26..b5e1fa36b 100644
--- a/docs/Using-Mastodon/Apps.md
+++ b/docs/Using-Mastodon/Apps.md
@@ -13,5 +13,6 @@ Some people have started working on apps for the Mastodon API. Here is a list of
 |Albatross|iOS||[@goldie_ice@mastodon.social](https://mastodon.social/users/goldie_ice)|
 |Tooter|Chrome|<https://github.com/ineffyble/tooter>|[@effy@mastodon.social](https://mastodon.social/users/effy)|
 |tootstream|CLI|<https://github.com/magicalraccoon/tootstream>|[@Raccoon@mastodon.social](https://mastodon.social/users/Raccoon)|
+|HackerNewsBot|CLI|<https://github.com/raymestalez/mastodon-hnbot>|[@rayalez@hackertribe.io](https://hackertribe.io/users/rayalez)|
 
 If you have a project like this, let me know so I can add it to the list!