diff --git a/Dockerfile b/Dockerfile
index 2e9746e..f6e4a9d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,11 +5,13 @@ RUN apk add --no-cache \
 	git \
 	mkdocs \
 	py3-pip \
+	mkdocs-material \
 	py3-pathspec py3-markupsafe py3-platformdirs
 ## The last line is only needed because nginx:alpine uses an older version, which doesn't have this dependency
 ## See https://pkgs.alpinelinux.org/package/edge/community/x86_64/mkdocs vs https://pkgs.alpinelinux.org/package/v3.19/community/x86_64/mkdocs
 
 ENV MKDOCKER_REPOSITORY_URL github.com/g2forge/mkdocker
+ENV MKDOCKER_REPOSITORY_LOGIN ''
 ENV MKDOCKER_REPOSITORY_BRANCH main
 ENV MKDOCKER_REPOSITORY_DIRECTORY example
 ENV MKDOCKER_LOCAL_DIRECTORY /mkdocker/docs
diff --git a/README.md b/README.md
index a93c9f2..05c86f4 100644
--- a/README.md
+++ b/README.md
@@ -20,12 +20,18 @@ docker run -d --mount type=bind,source=${pwd},target=/mkdocker/docs --publish 12
 ## Environment Variables
 
 * `MKDOCKER_REPOSITORY_URL` - The git repository to clone, without the protocol (default: `github.com/g2forge/mkdocker`)
+* `MKDOCKER_REPOSITORY_LOGIN` - A login (`username:password` or `github_PAT`) for the repository (default: none)
 * `MKDOCKER_REPOSITORY_BRANCH` - The branch in the git repository to build (default: `main`)
 * `MKDOCKER_REPOSITORY_DIRECTORY` - The subdirectory in the git repository to run the build in (default: `example`)
 * `MKDOCKER_LOCAL_DIRECTORY` - The directory inside the docker container to clone the repository in to, or to just use if already mounted (default: `/mkdocker/docs`)
 * `MKDOCKER_VENV_DIRECTORY` - The directory inside the docker container to use for the python virtual environment (default: `/mkdocker/venv`). This is only necessary if a `requirements.txt` is present, and can optionally be mounted to a docker volume for persistence.
 * `MKDOCKER_SERVE` - A boolean flag to enable `mkdocs serve` if set to `1` (default: `0`)
 
+## Requirements
+
+While the standard mkdocs and mkdocs-material packages are already installed, you can require other python packages by creating a `requirements.txt` in the repository directory.
+If this file exists, a virtual environment will be created, and any packages will be installed in it.
+
 ## Scripts
 
 mkdocker can run scripts both before and after the mkdocs build.
diff --git a/mkdocker/scripts/mkdocker.sh b/mkdocker/scripts/mkdocker.sh
index be6dd16..cba549c 100755
--- a/mkdocker/scripts/mkdocker.sh
+++ b/mkdocker/scripts/mkdocker.sh
@@ -8,7 +8,13 @@ if [ ! -d "${MKDOCKER_LOCAL_DIRECTORY}" ]; then
 	if [ -d .git ]; then
 		git pull
 	else
-		git clone "https://${MKDOCKER_REPOSITORY_URL}" .
+		if [ $MKDOCKER_REPOSITORY_LOGIN ]; then
+			echo "Login specified"
+			git clone "https://${MKDOCKER_REPOSITORY_LOGIN}@${MKDOCKER_REPOSITORY_URL}" .
+		else
+			echo "Login not specified"
+			git clone "https://${MKDOCKER_REPOSITORY_URL}" .
+		fi;
 		git checkout "${MKDOCKER_REPOSITORY_BRANCH}"
 	fi
 else