build: non-root USER, curl HEALTHCHECK, Nexus healthcheck in compose

docker-compose.yml

@@ -32,6 +32,12 @@ services:
     volumes:
       - nexus-data:/nexus-data
     restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-sf", "http://localhost:8081/service/rest/v1/status"]
+      interval: 15s
+      timeout: 5s
+      start_period: 60s
+      retries: 10
 
   nexus-setup:
     image: alpine:3.21