diff --git a/Dockerfile b/Dockerfile
index 4fc22d9..c43cdf7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,21 @@
-FROM node:22-bookworm-slim AS builder
+FROM ubuntu:24.04 AS builder
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl gnupg \
+    && curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
+    && apt-get install -y --no-install-recommends nodejs \
+    && rm -rf /var/lib/apt/lists/*
 WORKDIR /app
 COPY package.json package-lock.json ./
-RUN npm ci
+RUN npm ci --include=dev
 COPY . .
 RUN npm run build
 
-FROM node:22-bookworm-slim
+FROM ubuntu:24.04
+# python3+ffmpeg match the SHARED venv's Ubuntu 24.04 build, needed for
+# BOT/render_replay.py (replay-canvas rendering, mounted at deploy time).
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl gnupg python3 ffmpeg \
+    && curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
+    && apt-get install -y --no-install-recommends nodejs \
+    && rm -rf /var/lib/apt/lists/*
 WORKDIR /app
 COPY package.json package-lock.json ./
 RUN npm ci --omit=dev