book: update tau usage

doc/src/misc/tau.md

@@ -1,6 +1,6 @@
 # Tau
 
-Tasks management app using peer-to-peer network and raft consensus.  
+Encrypted tasks management app using peer-to-peer network and raft consensus.  
 multiple users can collaborate by working on the same tasks, and all users will have synced task list.
 
 
@@ -10,7 +10,7 @@ multiple users can collaborate by working on the same tasks, and all users will
 % git clone https://github.com/darkrenaissance/darkfi 
 % cd darkfi
 % make BINS="taud tau"
-% make install "BINS=taud tau" PREFIX=/home/XX/.local
+% make install "BINS=taud tau" PREFIX=/home/${USER}/.local
 ```
 
 ## Usage (Local Deployment)
@@ -64,33 +64,81 @@ connect to in the p2p network.
 		## Seed nodes to connect to 
 		seeds=["127.0.0.1:11001"]
 
+
+Also note that for the first time ever running seed node you must run it with 
+`--key-gen`:
+```shell
+% taud --key-gen
+```
+This will generate a new secret key in `/home/${USER}/.config/tau/secret_key` that 
+you can share with nodes you want them to get and decrypt your tasks, otherwise if you
+have already generated or got a copy from a peer place it in the same directory
+`/home/${USER}/.config/tau/secret_key`.
+
+
 ## Usage (CLI)
 
 ```shell
 % tau --help 
 ```
-
 	tau 0.3.0
 	Tau cli
 	
 	USAGE:
-	    tau [OPTIONS] [SUBCOMMAND]
+	    tau [FLAGS] [OPTIONS] [ARGS] [SUBCOMMAND]
+	
+	FLAGS:
+	    -h, --help       Prints help information
+	    -V, --version    Prints version information
+	    -v               Increase verbosity
 	
 	OPTIONS:
-	    -h, --help               Print help information
-	        --listen <LISTEN>    Rpc address [default: 127.0.0.1:8875]
-	    -v                       Increase verbosity
-	    -V, --version            Print version information
+	    -c, --config <config>     Sets a custom config file
+	        --rpc <rpc-listen>    JSON-RPC listen URL [default: 127.0.0.1:11055]
+	
+	ARGS:
+	    <id>            Get task by ID
+	    <filters>...    Search criteria (zero or more)
 	
 	SUBCOMMANDS:
-	    add            Add a new task
-	    get            Get task by ID
-	    get-comment    Get task's comments
-	    get-state      Get task state
-	    help           Print this message or the help of the given subcommand(s)
-	    list           List open tasks
-	    set-comment    Set comment for a task
-	    set-state      Set task state
-	    update         Update/Edit an existing task by ID
+	    add        Add a new task
+	    comment    Set or Get comment for a task
+	    help       Prints this message or the help of the given subcommand(s)
+	    list       List all tasks
+	    state      Set or Get task state
+	    update     Update/Edit an existing task by ID
+
+```shell
+% tau help [SUBCOMMAND]
+```
+
+### Example  
+
+```shell
+$ # add new task  
+$ tau add "new title"   
+$ tau add "new title" project:blockchain desc:"new description" rank:3 assign:dark
+$
+$ # lists tasks
+$ tau  		   		 
+$ tau open 			 # open tasks
+$ tau pause 		 # paused tasks
+$ tau 0522 		 	 # created at May 2022
+$ tau project:blockchain assign:dark
+$ tau rank:gt:n  # lists all tasks that have rank greater than n
+$ tau rank:ls:n  # lists all tasks that have rank lesser than n
+$
+$ # update task 
+$ tau update 3 project:network  rank:20
+$
+$ # state 
+$ tau state 3  # get state
+$ tau state 3 pause  # set the state to pause 
+$
+$ # comments 
+$ tau comments 1  # list comments
+$ tau comments 3 "new comment"  # add new comment 
+```
+