I've just cloned a Julia project from GitHub. How do I set it up to ensure all its dependencies are installed and precompiled, and how can I specify this project when I start Julia from the command line?
Navigate to the 'Working with Environment' section. Go to the 'Using someone else's project' subsection. Identify the command to set up and install dependencies for an existing project. Identify the command-line flag for specifying a project on Julia startup. Synthesize the identified commands and flags into a concise answer.
State that `Pkg.instantiate()` is the command to set up and install dependencies for an existing project. Mention the `--project` flag for specifying a project on Julia startup (e.g., `julia --project=.`).