chore: copy elk setup from docker-elk git repo

https://github.com/deviantony/docker-elk

setup/.dockerignore

@@ -0,0 +1,12 @@
+# Ignore Docker build files
+Dockerfile
+.dockerignore
+
+# Ignore OS artifacts
+**/.DS_Store
+
+# Ignore Git files
+.gitignore
+
+# Ignore setup state
+state/