Made the create command require a port number

process.go

@@ -15,12 +15,20 @@ type ProcessManager struct {
 	sync.RWMutex
 	ActiveInstances map[string]*exec.Cmd
 	StdinPipes      map[string]io.WriteCloser
+	LogBuffers      map[string]*InstanceLogBuffer
+}
+
+type InstanceLogBuffer struct {
+	sync.RWMutex
+	Lines    []string
+	MaxLines int
 }
 
 func NewProcessManager() *ProcessManager {
 	return &ProcessManager{
 		ActiveInstances: make(map[string]*exec.Cmd),
 		StdinPipes:      make(map[string]io.WriteCloser),
+		LogBuffers:      map[string]*InstanceLogBuffer{},
 	}
 }
 
@@ -66,6 +74,7 @@ func (pm *ProcessManager) StartInstance(name string, version string, options VsS
 
 	pm.ActiveInstances[name] = cmd
 	pm.StdinPipes[name] = stdinPipe
+	pm.LogBuffers[name] = NewInstanceLogBuffer(200)
 
 	go pm.streamLogs(name, stdoutPipe)
 	go pm.watchProcessExit(name, cmd)
@@ -79,9 +88,17 @@ func (pm *ProcessManager) streamLogs(name string, stdout io.ReadCloser) {
 	scanner := bufio.NewScanner(stdout)
 
 	for scanner.Scan() {
-		//stream straight to the manager console terminal,
-		// but later dispatch payloads to our web UI or a log file
-		fmt.Printf("[%s]: %s\n", name, scanner.Text())
+		line := scanner.Text()
+
+		fmt.Printf("[%s]: %s\n", name, line)
+
+		pm.RLock()
+		buf, exists := pm.LogBuffers[name]
+		pm.RUnlock()
+
+		if exists {
+			buf.Append(line)
+		}
 	}
 }
 
@@ -119,3 +136,31 @@ func (pm *ProcessManager) SendCommand(name string, command string) error {
 
 	return nil
 }
+
+func NewInstanceLogBuffer(maxLines int) *InstanceLogBuffer {
+	return &InstanceLogBuffer{
+		Lines:    make([]string, 0, maxLines),
+		MaxLines: maxLines,
+	}
+}
+
+func (lb *InstanceLogBuffer) Append(line string) {
+	lb.Lock()
+	defer lb.Unlock()
+
+	if len(lb.Lines) >= lb.MaxLines {
+		// Shift array out by dropping index 0
+		lb.Lines = lb.Lines[1:]
+	}
+	lb.Lines = append(lb.Lines, line)
+}
+
+func (lb *InstanceLogBuffer) GetSnapshot() []string {
+	lb.RLock()
+	defer lb.RUnlock()
+
+	// Return a copy so the caller can safely iterate or serialize to JSON without lock conflicts
+	snapshot := make([]string, len(lb.Lines))
+	copy(snapshot, lb.Lines)
+	return snapshot
+}