feat(docker): containerise the setup

Dockerfile

@@ -0,0 +1,28 @@
+FROM node:22-alpine AS base
+WORKDIR /app
+
+FROM base AS deps
+COPY package.json package-lock.json ./
+RUN npm ci
+
+FROM base AS build
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+ARG NEXT_PUBLIC_SUPABASE_URL
+ARG NEXT_PUBLIC_SUPABASE_ANON_KEY
+ENV NEXT_PUBLIC_SUPABASE_URL=$NEXT_PUBLIC_SUPABASE_URL
+ENV NEXT_PUBLIC_SUPABASE_ANON_KEY=$NEXT_PUBLIC_SUPABASE_ANON_KEY
+RUN npm run build
+
+FROM base AS runner
+ENV NODE_ENV=production
+RUN addgroup --system --gid 1001 nodejs && \
+    adduser --system --uid 1001 nextjs
+COPY --from=build /app/public ./public
+COPY --from=build --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=build --chown=nextjs:nodejs /app/.next/static ./.next/static
+USER nextjs
+EXPOSE 3000
+ENV PORT=3000
+ENV HOSTNAME=0.0.0.0
+CMD ["node", "server.js"]