Plain Flags back end is best installed and run as Docker containers. Below are two examples.

Available PlainFlags container images work on Linux AMD64 and ARM64 architectures.

To use the Plain Flags SDK, install it as follows:
NodeJs (TypeScript)
npm install plain-flags-node-sdk
Go (Golang)
go get github.com/andreileonte1981/plain-flags/sdk/go
Python
pip install plain-flags-sdk
Dart / Flutter
dart pub add plain_flags

Plain Flags source code is freely available.

You can choose to build and run your own installation from the source code: github repository