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diff --git a/utils/container-run.sh b/utils/container-run.sh
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+++ b/utils/container-run.sh
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+#!/bin/sh
+
+# A simple script to run commands (e.g. build commands) in a Docker container.
+# It can be used for testing on platforms different from the host. For example,
+# the command
+# 
+# ./container-run.sh arm ./build test
+#
+# builds nissy and runs the unit tests in an ARM container.
+#
+# The containers are based on Alpine Linux and the contain the necessary tools
+# to build the main library and the C++ and Python examples. They DO NOT
+# contain the emscripten compiler, so they cannot be used to build the web
+# version (e.g. ./build web or ./buidl webtest).
+# The images are given a tag starting with 'localhost/nissy/'.
+#
+# See below for a list of options.
+
+usage() {
+        echo "$1"
+        echo ""
+        echo "usage: $0 PLATFORM [COMMAND]"
+        echo ""
+        echo "If COMMAND is unspecified, an interactive shell will be opened."
+        echo ""
+        echo "Available platforms:"
+        echo "x86   (equivalent to: x86_64, amd64)"
+        echo "arm   (equivalent to: arm64)"
+        echo ""
+        echo "Examples:"
+        echo "$0 ram ./build test   # Run unit tests in arm container"
+        exit 1
+}
+
+if [ -z "$1" ]; then
+        usage "No platform given."
+fi
+
+case "$1" in
+x86|x86_64|amd64)
+        p=amd64
+        shift
+        ;;
+arm|arm64)
+        p=arm64
+        shift
+        ;;
+*)
+        usage "Platform '$1' not available."
+        ;;
+esac
+
+image="localhost/nissy/alpine-$p"
+platform="--platform=linux/$p"
+mount="--mount type=bind,src=./,dst=/nissy-core"
+flags="--rm --privileged"
+
+dockerfile="$(mktemp)"
+cat > "$dockerfile" << EOF
+FROM alpine:3.22.1
+RUN apk update
+RUN apk add gcc g++ clang python3 python3-dev
+#COPY . ./nissy-core
+RUN mkdir /nissy-core
+WORKDIR /nissy-core
+USER 1000:1000
+EOF
+
+docker build "$platform" -f "$dockerfile" -t "$image" .
+rm "$dockerfile"
+
+if [ -z "$1" ]; then 
+        docker run $flags $mount "$platform" -it "$image" /bin/sh
+else
+        docker run $flags $mount "$platform" -t "$image" $@
+fi