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fix: let self-hosted web builds bake their own public URL #2267

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fix: let self-hosted web builds bake their own public URL #2267

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3 changes: 2 additions & 1 deletion apps/web/Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,8 @@ COPY . .
RUN --mount=type=cache,id=bun-1.4.0,target=/root/.bun/install/cache bun install --frozen-lockfile

ARG NEXT_PUBLIC_DOCKER_BUILD=true
ENV NEXT_PUBLIC_WEB_URL=http://localhost:3000
ARG NEXT_PUBLIC_WEB_URL=http://localhost:3000
ENV NEXT_PUBLIC_WEB_URL=$NEXT_PUBLIC_WEB_URL

RUN bun run build:web

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8 changes: 8 additions & 0 deletions apps/web/content/docs/self-hosting.mdx
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Expand Up @@ -70,6 +70,14 @@ MYSQL_PASSWORD=your-secure-password
MINIO_ROOT_PASSWORD=your-minio-password
```

**Building your own web image:**

`CAP_URL` is read at runtime by the server, but the browser bundle gets its copy of the public URL baked in at build time from `NEXT_PUBLIC_WEB_URL`. The pre-built `ghcr.io` image bakes `http://localhost:3000`. If you build `apps/web/Dockerfile` yourself, pass your public URL as a build argument so share links, embeds and CORS work in the browser:

```bash
docker build -f apps/web/Dockerfile --build-arg NEXT_PUBLIC_WEB_URL=https://cap.yourdomain.com .
```

### Option 2: Railway (One-Click)

[![Deploy on Railway](https://railway.com/button.svg)](https://railway.com/new/template/PwpGcf)
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