feat : Add Dockerfile and .dockerignore for containerization setup

.dockerignore

@@ -0,0 +1,5 @@
+node_modules
+.nuxt
+.output
+.env
+.git

Dockerfile

@@ -0,0 +1,20 @@
+FROM node:current-alpine AS base
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+
+FROM base AS dev
+ENV HOST=0.0.0.0
+ENV PORT=3000
+EXPOSE 3000
+CMD ["npm", "run", "dev"]
+
+FROM base AS builder
+COPY . .
+RUN npm run build
+
+FROM node:current-alpine AS prod
+WORKDIR /app
+COPY --from=builder /app/.output ./.output
+EXPOSE 3000
+CMD ["node", ".output/server/index.mjs"]