diff --git a/.dockerignore b/.dockerignore
index aaeeab2..20c6ccc 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,10 +1,51 @@
-_build/
-deps/
-.git/
+
+# This file excludes paths from the Docker build context.
+#
+# By default, Docker's build context includes all files (and folders) in the
+# current directory. Even if a file isn't copied into the container it is still sent to
+# the Docker daemon.
+#
+# There are multiple reasons to exclude files from the build context:
+#
+# 1. Prevent nested folders from being copied into the container (ex: exclude
+#    /assets/node_modules when copying /assets)
+# 2. Reduce the size of the build context and improve build time (ex. /build, /deps, /doc)
+# 3. Avoid sending files containing sensitive information
+#
+# More information on using .dockerignore is available here:
+# https://docs.docker.com/engine/reference/builder/#dockerignore-file
+
+.dockerignore
+
+# Ignore git, but keep git HEAD and refs to access current commit hash if needed:
+#
+# $ cat .git/HEAD | awk '{print ".git/"$2}' | xargs cat
+# d0b8727759e1e0e7aa3d41707d12376e373d5ecc
+.git
+!.git/HEAD
+!.git/refs
+
+# Common development/test artifacts
+/cover/
+/doc/
+/test/
+/tmp/
+.elixir_ls
+
+# Mix artifacts
+/_build/
+/deps/
+*.ez
+
+# Generated on crash by the VM
+erl_crash.dump
+
+# Static artifacts - These should be fetched and built inside the Docker image
+/assets/node_modules/
+/priv/static/assets/
+/priv/static/cache_manifest.json
+
 .gitignore
 Dockerfile
-Makefile
 README*
 test/
-priv/static/
-hosting/
diff --git a/lib/klausurarchiv_web/templates/page/index.html.slime b/lib/klausurarchiv_web/templates/page/index.html.slime
index 7016c44..4fa4200 100644
--- a/lib/klausurarchiv_web/templates/page/index.html.slime
+++ b/lib/klausurarchiv_web/templates/page/index.html.slime
@@ -60,7 +60,7 @@ div.container
         h5.subtitle.is-5 =gettext("Hint")
         h6.is-6.pb-3
           span = gettext("If you have any problems or suggestions, please contact:")
-        a.button.is-link.is-light.has-text-weight-semibold(href="mailto:gerrit.kruse@fachschaft-wiwi.ms") gerrit.kruse@fachschaft-wiwi.ms
+        a.button.is-link.is-light.has-text-weight-semibold(href="mailto:klausurarchiv@fachschaft-wiwi.ms") klausurarchiv@fachschaft-wiwi.ms
 
 
       div.box