Move flags after the command (#2100)

The built-in help also shows flags to given after the command. Align
documentation examples accordingly.

docs/running-headscale-container.md

@@ -117,7 +117,7 @@ To register a machine when running `headscale` in a container, take the headscal
 
 ```shell
 docker exec headscale \
-  headscale --user myfirstuser nodes register --key <YOUR_MACHINE_KEY>
+  headscale nodes register --user myfirstuser --key <YOUR_MACHINE_KEY>
 ```
 
 ### Register machine using a pre authenticated key
@@ -126,7 +126,7 @@ Generate a key using the command line:
 
 ```shell
 docker exec headscale \
-  headscale --user myfirstuser preauthkeys create --reusable --expiration 24h
+  headscale preauthkeys create --user myfirstuser --reusable --expiration 24h
 ```
 
 This will return a pre-authenticated key that can be used to connect a node to `headscale` during the `tailscale` command:

docs/running-headscale-linux-manual.md

@@ -92,15 +92,15 @@ tailscale up --login-server YOUR_HEADSCALE_URL
 Register the machine:
 
 ```shell
-headscale --user myfirstuser nodes register --key <YOUR_MACHINE_KEY>
+headscale nodes register --user myfirstuser --key <YOUR_MACHINE_KEY>
 ```
 
 ### Register machine using a pre authenticated key
 
 Generate a key using the command line:
 
 ```shell
-headscale --user myfirstuser preauthkeys create --reusable --expiration 24h
+headscale preauthkeys create --user myfirstuser --reusable --expiration 24h
 ```
 
 This will return a pre-authenticated key that can be used to connect a node to `headscale` during the `tailscale` command:

docs/running-headscale-linux.md

@@ -78,15 +78,15 @@ tailscale up --login-server <YOUR_HEADSCALE_URL>
 Register the machine:
 
 ```shell
-headscale --user myfirstuser nodes register --key <YOUR_MACHINE_KEY>
+headscale nodes register --user myfirstuser --key <YOUR_MACHINE_KEY>
 ```
 
 ### Register machine using a pre authenticated key
 
 Generate a key using the command line:
 
 ```shell
-headscale --user myfirstuser preauthkeys create --reusable --expiration 24h
+headscale preauthkeys create --user myfirstuser --reusable --expiration 24h
 ```
 
 This will return a pre-authenticated key that is used to

docs/running-headscale-openbsd.md

@@ -129,15 +129,15 @@ tailscale up --login-server YOUR_HEADSCALE_URL
 Register the machine:
 
 ```shell
-headscale --user myfirstuser nodes register --key <YOUR_MACHINE_KEY>
+headscale nodes register --user myfirstuser --key <YOUR_MACHINE_KEY>
 ```
 
 ### Register machine using a pre authenticated key
 
 Generate a key using the command line:
 
 ```shell
-headscale --user myfirstuser preauthkeys create --reusable --expiration 24h
+headscale preauthkeys create --user myfirstuser --reusable --expiration 24h
 ```
 
 This will return a pre-authenticated key that can be used to connect a node to `headscale` during the `tailscale` command:

docs/running-headscale-sealos.md

@@ -41,15 +41,15 @@ tailscale up --login-server YOUR_HEADSCALE_URL
 To register a machine when running headscale in [Sealos](https://sealos.io), click on 'Terminal' button on the right side of the headscale application's detail page to access the Terminal of the headscale application, then take the headscale command:
 
 ```bash
-headscale --user myfirstuser nodes register --key <YOUR_MACHINE_KEY>
+headscale nodes register --user myfirstuser --key <YOUR_MACHINE_KEY>
 ```
 
 ### Register machine using a pre authenticated key
 
 click on 'Terminal' button on the right side of the headscale application's detail page to access the Terminal of the headscale application, then generate a key using the command line:
 
 ```bash
-headscale --user myfirstuser preauthkeys create --reusable --expiration 24h
+headscale preauthkeys create --user myfirstuser --reusable --expiration 24h
 ```
 
 This will return a pre-authenticated key that can be used to connect a node to `headscale` during the `tailscale` command: