add(ui/ux): show the running version and build stamp in the header

docker-compose.yml

@@ -1,6 +1,10 @@
 services:
   wordarr:
-    build: .
+    build:
+      context: .
+      args:
+        # e.g. WORDARR_BUILD=$(git rev-parse --short HEAD) docker compose up -d --build
+        WORDARR_BUILD: ${WORDARR_BUILD:-}
     container_name: wordarr
     ports:
       - "8787:8787"