Document authentication

# MANUAL STEP: Fill in docker.env file (use docker.env.dist as a template)

# Setup TLS Client Auth:

# Option 1: Keep it disabled.

# Setup authentication

# Option 1: Keep it disabled (this gives access to audit data to EVERYONE)

    # touch nginx/trusted_client_certs.pem

# Option 2: Set it up.

# Option 2: Set up TLS Client Auth

    # MANUAL STEP: create file nginx/trusted_client_certs.pem and put certificate(s) (CA or individual) there

    # sed -i 's/ssl_verify_client off;/ssl_verify_client on;/' nginx/nginx.conf

# Option 3: Use password based authentication (see file nginx/nginx.conf)

# Option 4: Authenticate using another (external) reverse proxy. In that case make sure support for websockets is enabled.

docker-compose up --build -d

```

    ssl_certificate_key /etc/ssl/private/key.pem;

    ssl_password_file /etc/ssl/private/keys.pass;

    # It is possible to disable TLS Client cert verification and use password-based one instead.

    # https://docs.nginx.com/nginx/admin-guide/security-controls/configuring-http-basic-authentication/

    ssl_verify_client off; # on | off | optional | optional_no_ca;

    ssl_verify_depth 10;

    ssl_client_certificate /etc/ssl/certs/trusted_client_certs.pem;