# Build Space After creating a Space, you'll have an empty repository to develop your code. A `dockerfile` or `deploy.yaml` is required. * A `dockerfile` is a text document that contains all the commands a user could call on the command line to assemble an image. * A `deploy.yaml` is a configuration file, written using [Lagrange Definition Language (LDL)](/spaces/intro/lagrange-definition-language-ldl.md)**,** which is used to specify deployment details for a Space on the Lagrange. You can create/upload each file through the [**Web UI**](/spaces/build-space/option-2-web-interface.md) or via [**Lagrange-cli**](/spaces/intro/lagrange-cli.md). ### `dockerfile` or `deploy.yaml` In determining the choice of deployment file, consider the following: * Use a `dockerfile` if you don't have a pre-built image. * Use `deploy.yaml` if you have an existing image to deploy. * For many files, [**Lagrange-cli**](/spaces/intro/lagrange-cli.md) is recommended to choose to upload them. * For large files( ＞50MB）, upload to [**Multichain.Storage**](https://www.multichain.storage/) first, and add its IPFS link to your `dockerfile` or `deploy.yaml`. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.lagrangedao.org/spaces/build-space.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.