diff --git a/ubuntu20-04/build-i3lock.dockerfile b/ubuntu20-04/build-i3lock.dockerfile
new file mode 100644
index 0000000..b053be1
--- /dev/null
+++ b/ubuntu20-04/build-i3lock.dockerfile
@@ -0,0 +1,20 @@
+# step 1: create a container for i3lock named "i3lock"
+# docker -D build --no-cache -t i3lock .
+#
+# step 2: run bash in the container, e.g. to run i3lock from the command line
+# docker run -it i3lock bash
+
+FROM ubuntu:20.04
+
+WORKDIR /build/i3lock-color
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update \
+    && apt-get install -y git autoconf gcc make pkg-config libpam0g-dev libcairo2-dev libfontconfig1-dev libxcb-composite0-dev libev-dev libx11-xcb-dev libxcb-xkb-dev libxcb-xinerama0-dev libxcb-randr0-dev libxcb-image0-dev libxcb-util-dev libxcb-xrm-dev libxkbcommon-dev libxkbcommon-x11-dev libjpeg-dev
+
+RUN git clone https://github.com/Raymo111/i3lock-color.git /build/i3lock-color
+
+RUN ./build.sh
+
+CMD ["sleep", "infinity"]
\ No newline at end of file
diff --git a/ubuntu20-04/build-i3lock.sh b/ubuntu20-04/build-i3lock.sh
new file mode 100755
index 0000000..10fd29a
--- /dev/null
+++ b/ubuntu20-04/build-i3lock.sh
@@ -0,0 +1,4 @@
+docker build -f build-i3lock.dockerfile --no-cache -t build-i3lock:latest .
+docker run -d --name build-i3lock build-i3lock:latest
+docker cp build-i3lock:/build/i3lock-color/build/i3lock ~/bin/i3lock
+docker remove -f build-i3lock