Update README with config and database info

1 files changed, 21 insertions, 1 deletions

diff --git a/README.md b/README.md
index 71b962d..89ddc26 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ $ openssl rsa -in gradecoin.pem -outform PEM -pubout -out gradecoin.pub
 Use `gradecoin.pub` file in your client program.
 
 Create students list: `students.csv` should be in the following form:
-```sh
+```
 User ID, Password
 e123456,register_password
 e123456,register_password
@@ -41,6 +41,26 @@ $ cargo run
 
 The server should be up on `localhost:8080`.
 
+The default config file is `config.yaml`.
+You can specify another config file with:
+```sh
+$ cargo run another_config.yaml
+```
+
+You can even run multiple networks at once by giving multiple configuration files:
+```sh
+# Run both the main network (at /) and testnet (at /testnet)
+# For example, register for main network at `localhost:8080/register`,
+# testnet network at `localhost:8080/testnet/register`
+$ cargo run config.yaml testnet.yaml
+```
+In the config file, `url_prefix` field determines the address of the network.
+
+You can clear the database for all networks by running:
+```sh
+$ rm -rf blocks users
+```
+Or you can delete the database for a particular network by removing `blocks/network_name` and `users/network_name`.
 
 # References
 - https://github.com/blurbyte/restful-rust