diff --git a/config/docker/Dockerfile.danbooru b/config/docker/Dockerfile.danbooru
index ecb71bfeb..6ed90d067 100644
--- a/config/docker/Dockerfile.danbooru
+++ b/config/docker/Dockerfile.danbooru
@@ -47,6 +47,9 @@ RUN yarn install
 
 COPY . .
 
+ARG SOURCE_COMMIT
+RUN echo "$SOURCE_COMMIT" > REVISION
+
 
 
 FROM development AS assets
diff --git a/hooks/README.md b/hooks/README.md
new file mode 100644
index 000000000..e95c20bd6
--- /dev/null
+++ b/hooks/README.md
@@ -0,0 +1,27 @@
+The directory contains hooks used by Docker Hub when building images:
+
+    Docker Hub allows you to override and customize the `build`, `test` and `push`
+    commands during automated build and test processes using hooks. For
+    example, you might use a build hook to set build arguments used only during
+    the build process. (You can also set up custom build phase hooks to perform
+    actions in between these commands.)
+
+    Use these hooks with caution. The contents of these hook files replace the
+    basic `docker` commands, so you must include a similar build, test or push
+    command in the hook or your automated process does not complete.
+
+    To override these phases, create a folder called `hooks` in your source code
+    repository at the same directory level as your Dockerfile. Create a file
+    called `hooks/build`, `hooks/test`, or `hooks/push` and include commands that the
+    builder process can execute, such as `docker` and `bash` commands (prefixed
+    appropriately with `#!/bin/bash`).
+
+    These hooks will be running on an instance of Amazon Linux 2, a distro
+    based on Ubuntu, which includes interpreters such as Perl and Python and
+    utilities such as git or curl. Please check the link above for the full
+    list.
+
+# See also
+
+* https://docs.docker.com/docker-hub/builds/advanced
+* https://stackoverflow.com/questions/59057978/passing-source-commit-to-dockerfile-commands-on-docker-hub
diff --git a/hooks/build b/hooks/build
new file mode 100755
index 000000000..6a848ba81
--- /dev/null
+++ b/hooks/build
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# This file is used to add the Git commit hash to the Docker image when the
+# image is built by Docker Hub.
+#
+# https://docs.docker.com/docker-hub/builds/advanced/
+# https://stackoverflow.com/questions/59057978/passing-source-commit-to-dockerfile-commands-on-docker-hub
+#
+# SOURCE_COMMIT: the SHA1 hash of the commit being tested.
+# DOCKERFILE_PATH: the dockerfile currently being built.
+# IMAGE_NAME: the name and tag of the Docker repository being built. (This variable is a combination of DOCKER_REPO:DOCKER_TAG.)
+
+docker build --build-arg SOURCE_COMMIT=$SOURCE_COMMIT -f $DOCKERFILE_PATH -t $IMAGE_NAME .