Neo is a single file server. It responds to every GET request it receives with the content of a given file (specified by ENV or CLI argument), and for every other request (with any other HTTP method or path) it returns a 404.

Neo was invented to help with cases where a generally small file needs to be delivered at a certain path, for example MTA STS's /.well-known/mta-sts.txt.

See also Neo-Rust

Neo only needs the path to a single file to run:

$ Neo <file path>

By default, Neo will serve the file at host 127.0.0.1 on port 5000. Neo can also take file content from STDIN like so:

$ Neo <<EOF
> your file content
> goes here
> EOF

To run Neo with docker:

$ docker run --detach \
-p 5000:5000 \
-e HOST=0.0.0.0 \
-e FILE=/data/file \
-v /path/to/folder/with/your/file:/data \
--name Neo-go \
registry.gitlab.com/visheshc14/Neo-Go/cli:v2

Note that v1 of Neo-Go used net/http, and v2 uses fasthttp.

$ ./Neo --help
Usage of ./Neo:
  -file string
        File to read
  -host string
        Host
  -port int
        Port (default -1)
  -stdin-read-timeout-seconds int
        Amount of seconds to wait for input on STDIN to serve (default -1)