Use node:bookworm-slim instead of ubuntu image

- Size of final Ubuntu image: `652MB`
- Size of final Node:bookworm-slim image: `361MB`

Additionally, flexibly sets the path for `libjemalloc` based off the container's architecture.

sequencing-server/Dockerfile

@@ -1,21 +1,13 @@
+FROM node:18.20-bookworm-slim
 
-## Use a Debian-based image for apt-get compatibility
-FROM ubuntu:24.04
+# Install jemalloc
+RUN apt-get update \
+    && apt-get install --no-install-recommends -y libjemalloc-dev
 
-# Update package lists
-RUN apt-get update && apt-get install --no-install-recommends  -y curl gnupg ca-certificates
+# Set the path for jemalloc
+RUN echo "/usr/lib/$(uname -m)-linux-gnu/libjemalloc.so" >> /etc/ld.so.preload
 
-# Install NodeSource repository for node 18 LTS
-RUN curl -sL https://deb.nodesource.com/setup_18.x | bash -
-
-# Update package lists again after adding NodeSource
-RUN apt-get update && apt-get install --no-install-recommends -y nodejs
-
-# Install jemalloc and set the path
-RUN apt-get update && apt-get install --no-install-recommends -y libjemalloc-dev \
- && echo "/usr/lib/x86_64-linux-gnu/libjemalloc.so" >> /etc/ld.so.preload
-
-# Set working directory (optiona
+# Set working directory
 COPY . /app
 WORKDIR /app
 CMD [ "npm", "start" ]