feat: add user port support (#26)

* feat: add user port support

* fix: fix unit test and improve isolation

* refactor: remove some fixture

README.md

@@ -77,6 +77,15 @@ cubbi session connect SESSION_ID
 # Close a session when done
 cubbi session close SESSION_ID
 
+# Close a session quickly (kill instead of graceful stop)
+cubbi session close SESSION_ID --kill
+
+# Close all sessions at once
+cubbi session close --all
+
+# Close all sessions quickly
+cubbi session close --all --kill
+
 # Create a session with a specific image
 cubbix --image goose
 cubbix --image opencode
@@ -93,6 +102,11 @@ cubbix -v ~/data:/data -v ./configs:/etc/app/config
 cubbix .
 cubbix /path/to/project
 
+# Forward ports from container to host
+cubbix --port 8000                    # Forward port 8000
+cubbix --port 8000,3000,5173         # Forward multiple ports (comma-separated)
+cubbix --port 8000 --port 3000       # Forward multiple ports (repeated flag)
+
 # Connect to external Docker networks
 cubbix --network teamnet --network dbnet
 
@@ -235,6 +249,26 @@ cubbi config volume remove /local/path
 
 Default volumes will be combined with any volumes specified using the `-v` flag when creating a session.
 
+### Default Ports Configuration
+
+You can configure default ports that will be automatically forwarded in every new session:
+
+```bash
+# List default ports
+cubbi config port list
+
+# Add a single port to defaults
+cubbi config port add 8000
+
+# Add multiple ports to defaults (comma-separated)
+cubbi config port add 8000,3000,5173
+
+# Remove a port from defaults
+cubbi config port remove 8000
+```
+
+Default ports will be combined with any ports specified using the `--port` flag when creating a session.
+
 ### Default MCP Servers Configuration
 
 You can configure default MCP servers that sessions will automatically connect to: