These instructions are to build and run mjolnir without using Docker.
You need to have installed yarn 1.x and Node 16.
git clone https://github.com/matrix-org/mjolnir.git
cd mjolnir
yarn install
yarn build
# Copy and edit the config. It *is* recommended to change the data path,
# as this is set to `/data` by default for dockerized mjolnir.
cp config/default.yaml config/production.yaml
nano config/production.yaml
node lib/index.js --mjolnir-config ./config/production.yaml