There are two ways of installing Mercur: the CLI script or manual installation.
Follow these steps to install and run Mercur backend on your operating system: Step 1: Clone the Mercur repository: 
git clone https://github.com/mercurjs/mercur.git
Step 2: Navigate to the Mercur directory and execute the following commands: 
cd mercur
yarn install
yarn build
Step 3: Go to the backend directory and prepare .env file 
cd apps/backend

cp .env.template .env
Step 4: Configure database credentials in the .env file 
# Replace user, password, address and port parameters with your values
DATABASE_URL=postgres://[user]:[password]@[address]:[port]/$DB_NAME
# For example:
DATABASE_URL=postgres://postgres:postgres@localhost:5432/$DB_NAME
Do not delete $DB_NAME from the connection string. You’ll be prompted to choose database name during the next step.
Step 5: Setup database and run migrations 
yarn medusa db:create && yarn medusa db:migrate && yarn seed
Step 6: Generate OpenApi specs from the Mercur backend 
yarn generate:oas
Step 7: Create admin user 
npx medusa user --email <email> --password <password>
Optional step: Run the seed script. This will set up all necessary configuration, along with example seller and products. Recommended for new users. 
yarn seed
Default seller credentials (to login into vendor panel): 
email: seller@mercurjs.com
password: secret
Step 8: Go to the root directory and generate http-client class 
cd ../..

yarn codegen
Step 9: Run Turborepo 
yarn dev