added docker file

assignment-db-service/DockerfileDEV

@@ -0,0 +1,29 @@
+# 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
+
+# Then copy the rest of the application code
+COPY . .
+
+# Install build tools (needed for bcrypt native bindings)
+RUN apt-get update -y && apt-get install -y build-essential python3 openssl
+
+# Copy only package files first (faster caching)
+COPY package*.json ./
+
+# Install dependencies
+RUN npm install && npx prisma generate
+
+# Rebuild bcrypt specifically (optional if clean install is guaranteed)
+RUN npm rebuild bcrypt --build-from-source
+
+# Expose the application port
+EXPOSE 3200
+
+# Start the application
+CMD ["node", "app.js"]