diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..578652c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+test*/
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..8518443
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,9 @@
+FROM docker.io/debian:12-slim
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        imagemagick \
+        zenity \
+    && rm -rf /var/lib/apt/lists/*
+COPY compress /usr/local/bin/
+CMD ["compress", "/images/"]
diff --git a/compose.yaml b/compose.yaml
new file mode 100644
index 0000000..0f2d324
--- /dev/null
+++ b/compose.yaml
@@ -0,0 +1,12 @@
+---
+services:
+  app:
+    build: .
+    environment:
+      - DISPLAY=$DISPLAY
+      - XAUTHORITY=/.Xauthority
+    volumes:
+      - ./test/:/images/:ro
+      - ./test_1080p/:/images_1080p/
+      - "$XAUTHORITY:/.Xauthority:ro"
+      - "/tmp/.X11-unix/:/tmp/.X11-unix/"
diff --git a/test.sh b/test.sh
new file mode 100755
index 0000000..f39c7ae
--- /dev/null
+++ b/test.sh
@@ -0,0 +1,7 @@
+#!/bin/bash -e
+
+mkdir -p test test_1080p
+
+gm convert -size 3840x2160 xc:black test/000.png
+
+printf '%s\n' {001..127} | xargs -P0 -I'{}' cp test/000.png test/'{}'.png