fix: improve container detection to support Podman and other runtimes

Replace single /.dockerenv check with a robust isInContainer() helper
that covers Docker, Podman (/.containerenv), cgroup-based detection
(containerd, LXC) and /proc/1/environ as a general fallback.

server/config.ts

@@ -8,6 +8,28 @@ export const BASE_DIR = _isBunBinary
     ? path.dirname((process as any).execPath)
     : process.cwd()
 
-export const DATA_DIR = fs.existsSync('/.dockerenv')
+const isInContainer = (): boolean => {
+    // Docker
+    if (fs.existsSync('/.dockerenv')) return true;
+
+    // Podman (crée un fichier /.containerenv)
+    if (fs.existsSync('/.containerenv')) return true;
+
+    // Vérification via cgroup (Docker, Podman, LXC, etc.)
+    try {
+        const cgroup = fs.readFileSync('/proc/1/cgroup', 'utf8');
+        if (/docker|podman|containerd|lxc/i.test(cgroup)) return true;
+    } catch {}
+
+    // Vérification via /proc/1/environ (fallback général)
+    try {
+        const environ = fs.readFileSync('/proc/1/environ', 'utf8');
+        if (environ.includes('container=')) return true;
+    } catch {}
+
+    return false;
+};
+
+export const DATA_DIR = isInContainer()
     ? '/config'
-    : path.join(BASE_DIR, 'config')
+    : path.join(BASE_DIR, 'config');