docs: added info about image labels (#3398)

docs/misc/troubleshooting.md

@@ -5,3 +5,33 @@ To troubleshoot just the command-line used to start the Minecraft server, set th
 To troubleshoot any issues with memory allocation reported by the JVM, set the environment variable `DEBUG_MEMORY` to `true`.
 
 If you are experiencing any issues with the "Changing ownership of /data" step, that can be disabled by setting `SKIP_CHOWN_DATA` to `true`.
+
+To confirm the image version that has been pulled, use the following command, replacing `itzg/minecraft-server` as needed for specific image tags:
+
+## Image labels
+
+```shell
+docker image inspect itzg/minecraft-server -f "{{json .Config.Labels}}"
+```
+
+such as
+
+```json
+{
+  "org.opencontainers.image.authors": "... <...@gmail.com>",
+  "org.opencontainers.image.created": "2025-04-03T02:15:51.405Z",
+  "org.opencontainers.image.description": "Docker image that provides a Minecraft Server for Java Edition that automatically downloads selected version at startup",
+  "org.opencontainers.image.licenses": "Apache-2.0",
+  "org.opencontainers.image.ref.name": "ubuntu",
+  "org.opencontainers.image.revision": "d6897a649ecbc16b5fb2e1500e24b64ef80270a0",
+  "org.opencontainers.image.source": "https://github.com/itzg/docker-minecraft-server",
+  "org.opencontainers.image.title": "docker-minecraft-server",
+  "org.opencontainers.image.url": "https://github.com/itzg/docker-minecraft-server",
+  "org.opencontainers.image.version": "java21"
+}
+```
+
+The labels that are most interesting are:
+- org.opencontainers.image.created
+- org.opencontainers.image.revision, which maps to https://github.com/itzg/docker-minecraft-server/commit/{revision}
+- org.opencontainers.image.version