diff --git a/1.20.0-rc.6/Dockerfile b/1.20.0-rc.6/Dockerfile
new file mode 100644
index 0000000..3f7519a
--- /dev/null
+++ b/1.20.0-rc.6/Dockerfile
@@ -0,0 +1,28 @@
+FROM hexpm/elixir:1.20.0-rc.6-erlang-28.5-ubuntu-noble-20260410
+
+ENV NODE_VERSION="20.12.2"
+ENV NODE_DOWNLOAD_URL="https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.xz"
+
+RUN <<EOF
+  set -xe
+  apt-get update
+
+  # Needs to run separately to build on M2/M3 Macs with Rosetta for some reason
+  # Ref: https://github.com/docker/for-mac/issues/7255#issuecomment-2540082464
+  apt-get install -y --no-install-recommends ca-certificates
+
+  # Install git so CI can clone the repository
+  apt-get install -y --no-install-recommends git
+
+  # Install curl and xz-utils to download and unpack the NodeJS binaries
+  apt-get install -y --no-install-recommends curl xz-utils
+
+  # Dependencies for Elixir to compile binaries
+  apt-get install -y --no-install-recommends make cmake g++
+
+  # Install NodeJS binary
+  curl -fSL -o node-dist.tar.xz $NODE_DOWNLOAD_URL
+  tar -xJf node-dist.tar.xz -C /usr/local --strip-components=1
+  rm node-dist.tar.xz
+  ln -sf /usr/local/bin/node /usr/local/bin/nodejs
+EOF