Update dockerfile

Author: finlay-davidson

Dockerfile

@@ -1,38 +1,41 @@
-# Stage 1: Build the Application
-# We use node:22 as the base for building and installing dependencies.
-FROM node:22 AS build
+# syntax = docker/dockerfile:1
 
-# Set the working directory inside the container
-WORKDIR /usr/src/app
+# Adjust NODE_VERSION as desired
+ARG NODE_VERSION=22.16.0
+FROM node:${NODE_VERSION}-slim AS base
 
-# Copy package.json and package-lock.json first to leverage Docker caching.
-# If these files don't change, subsequent builds can skip 'npm install'.
-COPY package*.json ./
+LABEL fly_launch_runtime="Node.js"
 
-# Install dependencies
-RUN npm install
+# Node.js app lives here
+WORKDIR /app
 
-# Copy the rest of the application source code
-COPY . .
+# Set production environment
+ENV NODE_ENV="production"
+ARG YARN_VERSION=1.22.5
+RUN npm install -g yarn@$YARN_VERSION --force
+
+
+# Throw-away build stage to reduce size of final image
+FROM base AS build
 
-# Stage 2: Create the Final Production Image
-# We use node:22 as the runtime image with all the necessary tools.
-FROM node:22
+# Install packages needed to build node modules
+RUN apt-get update -qq && \
+    apt-get install --no-install-recommends -y build-essential node-gyp pkg-config python-is-python3
 
-# Set the working directory
-WORKDIR /usr/src/app
+# Install node modules
+COPY package-lock.json package.json yarn.lock ./
+RUN yarn install --frozen-lockfile
+
+# Copy application code
+COPY . .
 
-# Copy the node_modules and built application files from the 'build' stage
-COPY --from=build /usr/src/app/node_modules ./node_modules
-COPY --from=build /usr/src/app/package*.json ./
-COPY --from=build /usr/src/app .
 
-# Expose the port your app runs on
-ENV PORT=8080
-EXPOSE $PORT
+# Final stage for app image
+FROM base
 
-# Run the application using the non-root user (recommended for security)
-USER node
+# Copy built application
+COPY --from=build /app /app
 
-# Define the command to start your application
-CMD [ "node", "index.js" ]
+# Start the server by default, this can be overwritten at runtime
+EXPOSE 3000
+CMD [ "yarn", "run", "start" ]