Add isCloudronManaged label to containers managed by cloudron

src/graphs.js

@@ -33,6 +33,7 @@ function startGraphite(existingInfra, callback) {
                 -p 127.0.0.1:2004:2004 \
                 -p 127.0.0.1:8000:8000 \
                 -v "${dataDir}/graphite:/var/lib/graphite" \
+                --label isCloudronManaged=true \
                 --read-only -v /tmp -v /run "${tag}"`;
 
     shell.execSync('startGraphite', cmd);