added docker file

auth-service/DockerfileDEV

@@ -0,0 +1,20 @@
+# 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 . .
+RUN npm install
+
+# Install dependencies using npm ci for deterministic builds
+# RUN --mount=type=cache,target=/root/.npm npm ci --production
+
+# Expose the application port
+EXPOSE 8080
+
+# Define the command to run the application
+CMD ["node", "server.js"]