Docker deployment not running server side code

Hello! This is the weirdest issue I've encountered yet. I have a very basic tanstack start app with a sidebar + main page that just says hello. I have some middleware that redirects users to the /login page if not signed in, this is server side.

When building this docker image on my gha runner, which is a docker in docker gha runner container, I get an image that seems to not want to execute server side code when running in k8s. It serves static assets but doesn't execute middleware for instance. I get zero logs, just the standard listening on 3000. I'm using nitro (vite config below)

I'm pretty sure this is not an issue with my gha runner as my nextjs apps server side code runs fine when built on the same runner.

Here is my docker image:

FROM alpine AS base # I've tried node:24-alpine
RUN apk add --update nodejs npm curl unzip ca-certificates
RUN npm i -g pnpm

FROM base AS deps
WORKDIR /app

COPY package.json pnpm-lock.yaml ./
RUN pnpm i --frozen-lockfile

FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

RUN pnpm run build

FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 app

COPY --from=builder --chown=app:nodejs /app/.output /app/.output

USER app

EXPOSE 3000

ENV PORT=3000

ENV HOST=0.0.0.0
CMD ["node", ".output/server/index.mjs"]

FROM alpine AS base # I've tried node:24-alpine
RUN apk add --update nodejs npm curl unzip ca-certificates
RUN npm i -g pnpm

FROM base AS deps
WORKDIR /app

COPY package.json pnpm-lock.yaml ./
RUN pnpm i --frozen-lockfile

FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

RUN pnpm run build

FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 app

COPY --from=builder --chown=app:nodejs /app/.output /app/.output

USER app

EXPOSE 3000

ENV PORT=3000

ENV HOST=0.0.0.0
CMD ["node", ".output/server/index.mjs"]

This image works fine when built on my mac.

Vite config:

const config = defineConfig({
  plugins: [
    devtools(),
    nitro(),
    // this is the plugin that enables path aliases
    viteTsConfigPaths({
      projects: ['./tsconfig.json'],
    }),
    tailwindcss(),
    tanstackStart(),
    viteReact({
      babel: {
        plugins: ['babel-plugin-react-compiler'],
      },
    }),
  ],
  nitro: {
    preset: 'node-server'
  }
})

export default config

const config = defineConfig({
  plugins: [
    devtools(),
    nitro(),
    // this is the plugin that enables path aliases
    viteTsConfigPaths({
      projects: ['./tsconfig.json'],
    }),
    tailwindcss(),
    tanstackStart(),
    viteReact({
      babel: {
        plugins: ['babel-plugin-react-compiler'],
      },
    }),
  ],
  nitro: {
    preset: 'node-server'
  }
})

export default config

TanStack•3mo ago•

28 replies

verbal-lime

Docker deployment not running server side code

FROM alpine AS base # I've tried node:24-alpine
RUN apk add --update nodejs npm curl unzip ca-certificates
RUN npm i -g pnpm

FROM base AS deps
WORKDIR /app

COPY package.json pnpm-lock.yaml ./
RUN pnpm i --frozen-lockfile

FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

RUN pnpm run build

FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 app

COPY --from=builder --chown=app:nodejs /app/.output /app/.output

USER app

EXPOSE 3000

ENV PORT=3000

ENV HOST=0.0.0.0
CMD ["node", ".output/server/index.mjs"]

FROM alpine AS base # I've tried node:24-alpine
RUN apk add --update nodejs npm curl unzip ca-certificates
RUN npm i -g pnpm

FROM base AS deps
WORKDIR /app

COPY package.json pnpm-lock.yaml ./
RUN pnpm i --frozen-lockfile

FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

RUN pnpm run build

FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 app

COPY --from=builder --chown=app:nodejs /app/.output /app/.output

USER app

EXPOSE 3000

ENV PORT=3000

ENV HOST=0.0.0.0
CMD ["node", ".output/server/index.mjs"]

This image works fine when built on my mac.

Vite config:

const config = defineConfig({
  plugins: [
    devtools(),
    nitro(),
    // this is the plugin that enables path aliases
    viteTsConfigPaths({
      projects: ['./tsconfig.json'],
    }),
    tailwindcss(),
    tanstackStart(),
    viteReact({
      babel: {
        plugins: ['babel-plugin-react-compiler'],
      },
    }),
  ],
  nitro: {
    preset: 'node-server'
  }
})

export default config

const config = defineConfig({
  plugins: [
    devtools(),
    nitro(),
    // this is the plugin that enables path aliases
    viteTsConfigPaths({
      projects: ['./tsconfig.json'],
    }),
    tailwindcss(),
    tanstackStart(),
    viteReact({
      babel: {
        plugins: ['babel-plugin-react-compiler'],
      },
    }),
  ],
  nitro: {
    preset: 'node-server'
  }
})

export default config

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