docs: update readme document

README.md

@@ -1,27 +1,88 @@
 ## Quick Start
 
-Start a syncplay service at `tcp/8999`, you can also specify a password.
+Start a syncplay service at `tcp/8999` with one command.
 
 ```bash
-docker run -d \
---network host \
---name syncplay \
---env PORT=<PORT> \
---env PASSWORD=<PASSWORD> \
-dnomd343/syncplay
+docker run -d --network host --name syncplay dnomd343/syncplay
+```
+
+More arguments can be specified.
+
+```bash
+docker run -d --network host --name syncplay dnomd343/syncplay \
+  --port 12345 --password dnomd343 --motd hello --isolate-room --disable-chat
 ```
 
-If TLS is enabled, you have to set certificate folder with `privkey.pem`, `cert.pem` and `chain.pem`.
+You can also use environment variables to specify.
 
 ```bash
-docker run -d \
---network host \
---name syncplay \
---env PORT=<PORT> \
---env PASSWORD=<PASSWORD> \
---env TLS=/certs \
---volume <certs>:/certs \
+docker run -d --network host --name syncplay \
+  --env PORT=12345 \
+  --env PASSWD=dnomd343 \
   dnomd343/syncplay
 ```
 
-You can get more information on the [official documentation](https://syncplay.pl/guide/server/).
+Enable TLS support of Syncplay server.
+
+```bash
+docker run -d --network host --name syncplay \
+  --volume /etc/ssl/certs/343.re/:/certs/ dnomd343/syncplay --enable-tls
+```
+
+> The `/etc/ssl/certs/343.re/` folder stores certificates and private key files, and specific introductions and examples will be given below.
+
+### Options
+
+You can specify the following arguments:
+
++ `--port [PORT]` ：Listening port of Syncplay server, the default is `8999`.
+
++ `--motd [MESSAGE]` ：The welcome text after the user enters the room.
+
++ `--password [PASSWD]` ：Authentication when the user connects to the syncplay server.
+
++ `--salt [SALT]` ：A string used to secure passwords (e.g. Rainbow-tables), defaults to empty.
+
++ `--random-salt` ：Use a randomly generated salt value, valid when `--salt` is not specified.
+
++ `--isolate-room` ：Room isolation enabled, users will not be able to see information from anyone other than their own room.
+
++ `--disable-chat` ：Disables the chat feature.
+
++ `--disable-ready` ：Disables the readiness indicator feature.
+
++ `--max-username-length` ：Maximum length of usernames (number of characters).
+
++ `--max-chat-message-length` ：Maximum length of chat messages (number of characters).
+
++ `--enable-tls` ：Enable tls support, the certificate directory should be synchronized to `/certs/`, including `cert.pem`, `chain.pem` and `privkey.pem` three files.
+
+    + `cert.pem` ：The certificate issued by the CA.
+    + `chain.pem` ：The certificate chain of CA service.
+    + `privkey.pem` ：The private key for the certificate.
+
+> For example, in [`acme.sh`](https://acme.sh/), they correspond to `--cert-file`, `--ca-file` and `--key-file` respectively, the following is an example of certificate installation.
+
+```bash
+# Export the domain `343.re` to `/etc/ssl/certs/343.re/`
+acme.sh --install-cert -d 343.re \
+  --cert-file  /etc/ssl/certs/343.re/cert.pem \
+  --ca-file    /etc/ssl/certs/343.re/chain.pem \
+  --key-file   /etc/ssl/certs/343.re/privkey.pem
+```
+
+You can also specify arguments through environment variables:
+
++ `PORT` ：Equivalent to `--port`.
+
++ `SALT` ：Equivalent to `--salt`.
+
++ `PASSWD` ：Equivalent to `--password`.
+
++ `TLS=ON` ：Equivalent to `--enable-tls`.
+
+> Note that its priority is lower than command line arguments.
+
+### License
+
+MIT ©2022 [@dnomd343](https://github.com/dnomd343)