feat: add dockerfile and config for standalone builds (#384)

Author: maciejkrol18

Dockerfile

@@ -0,0 +1,67 @@
+ARG NODE_VERSION=lts
+
+FROM node:${NODE_VERSION} AS dependencies
+
+WORKDIR /app
+
+COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* .npmrc* ./
+
+RUN --mount=type=cache,target=/root/.npm \
+    --mount=type=cache,target=/usr/local/share/.cache/yarn \
+    --mount=type=cache,target=/root/.local/share/pnpm/store \
+  if [ -f package-lock.json ]; then \
+    npm ci --no-audit --no-fund; \
+  elif [ -f yarn.lock ]; then \
+    corepack enable yarn && yarn install --frozen-lockfile --production=false; \
+  elif [ -f pnpm-lock.yaml ]; then \
+    corepack enable pnpm && pnpm install --frozen-lockfile; \
+  else \
+    echo "No lockfile found." && exit 1; \
+  fi
+
+FROM node:${NODE_VERSION} AS builder
+
+WORKDIR /app
+
+COPY --from=dependencies /app/node_modules ./node_modules
+COPY . .
+
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+
+RUN if [ -f package-lock.json ]; then \
+    npm run build; \
+  elif [ -f yarn.lock ]; then \
+    corepack enable yarn && yarn build; \
+  elif [ -f pnpm-lock.yaml ]; then \
+    corepack enable pnpm && pnpm build; \
+  else \
+    echo "No lockfile found." && exit 1; \
+  fi
+
+FROM node:${NODE_VERSION} AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+ENV NEXT_TELEMETRY_DISABLED=1
+
+COPY --from=builder --chown=node:node /app/public ./public
+
+RUN mkdir .next && chown node:node .next
+
+# Standalone output: copies server.js and all required node_modules
+COPY --from=builder --chown=node:node /app/.next/standalone ./
+# Static assets still need to be copied separately
+COPY --from=builder --chown=node:node /app/.next/static ./.next/static
+
+# Seed the fetch cache from build time
+COPY --from=builder --chown=node:node /app/.next/cache ./.next/cache
+
+USER node
+
+EXPOSE 3000
+
+CMD ["node", "server.js"]

next.config.ts

@@ -49,6 +49,7 @@ const nextConfig: NextConfig = {
     },
     viewTransition: true,
   },
+  output: "standalone",
 };
 
 const withNextIntl = createNextIntlPlugin();