Initial working google auth

auth-service/Dockerfile

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+# syntax=docker/dockerfile:1
+
+# Use the official Node.js image as the base image
+ARG NODE_VERSION=22.13.1
+FROM node:${NODE_VERSION}-slim AS base
+
+# Set the working directory
+WORKDIR /app
+
+# Copy package.json and package-lock.json for dependency installation
+COPY --link package.json package-lock.json ./
+
+# Install dependencies using npm ci for deterministic builds
+RUN --mount=type=cache,target=/root/.npm npm ci --production
+
+# Copy the application source code
+COPY --link . .
+
+# Set environment variables for production
+ENV NODE_ENV=production
+ENV NODE_OPTIONS="--max-old-space-size=4096"
+
+# Create a non-root user and switch to it
+RUN useradd -m appuser
+USER appuser
+
+# Expose the application port
+EXPOSE 8080
+
+# Define the command to run the application
+CMD ["node", "server.js"]