feat : Add Dockerfile and .dockerignore for containerization setup

.dockerignore

@@ -0,0 +1,4 @@
+node_modules
+dist
+.env
+.git

Dockerfile

@@ -0,0 +1,22 @@
+FROM node:current-alpine AS base
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+
+FROM base AS dev
+ENV PORT=3000
+EXPOSE 3000
+CMD ["npm", "run", "start:dev"]
+
+FROM base AS builder
+COPY . .
+RUN npx prisma generate
+RUN npm run build
+
+FROM node:current-alpine AS prod
+WORKDIR /app
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/prisma ./prisma
+EXPOSE 3000
+CMD ["node", "dist/main.js"]