Remove sudo from docker commands - use docker group membership instead

Agent changes:
- Changed docker ps and docker images commands to run without sudo
- cm-agent user is already in docker group, so sudo is not needed
- Fixes "unable to change to root gid: Operation not permitted" error
- Systemd security restrictions were blocking sudo gid changes

This fixes Docker container and image collection on systems with
systemd security hardening enabled.

Updated to version 0.1.178

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.176"
+version = "0.1.178"
 edition = "2021"
 
 [dependencies]

agent/src/collectors/systemd.rs

@@ -779,10 +779,10 @@ impl SystemdCollector {
     fn get_docker_containers(&self) -> Vec<(String, String)> {
         let mut containers = Vec::new();
 
-        // Check if docker is available (use sudo for permissions)
+        // Check if docker is available (cm-agent user is in docker group)
         // Use -a to show ALL containers (running and stopped)
-        let output = Command::new("sudo")
+        let output = Command::new("docker")
-            .args(&["docker", "ps", "-a", "--format", "{{.Names}},{{.Status}}"])
+            .args(&["ps", "-a", "--format", "{{.Names}},{{.Status}}"])
             .output();
 
         let output = match output {
@@ -826,15 +826,16 @@ impl SystemdCollector {
 
         info!("Collecting Docker images");
 
-        // Check if docker is available (use sudo for permissions)
+        // Check if docker is available (cm-agent user is in docker group)
-        let output = Command::new("sudo")
+        let output = Command::new("docker")
-            .args(&["docker", "images", "--format", "{{.Repository}}:{{.Tag}},{{.Size}}"])
+            .args(&["images", "--format", "{{.Repository}}:{{.Tag}},{{.Size}}"])
             .output();
 
         let output = match output {
             Ok(out) if out.status.success() => out,
             Ok(out) => {
-                info!("Docker images command failed with status: {}", out.status);
+                let stderr = String::from_utf8_lossy(&out.stderr);
+                info!("Docker images command failed with status: {}, stderr: {}", out.status, stderr);
                 return images;
             }
             Err(e) => {

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.176"
+version = "0.1.178"
 edition = "2021"
 
 [dependencies]

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.176"
+version = "0.1.178"
 edition = "2021"
 
 [dependencies]