For stable releases, Linux amd64 binaries will be compiled and attached to the release. For other systems or architectures, please build from source.
Check the Releases page to find the latest release and download the binary archive. Place the binary somewhere, for example in /usr/bin/camo. You have to decide how to run that binary in the background, but a systemd-unit is provided here.
For the main branch, GitHub Actions builds optimized binary artifacts as well. Click on the latest run of the build job to see the artifacts. The binaries generated by this task are functionally identical to the Release builds, but they're based on the latest main sources.