buildx failed with: ERROR: failed to build: invalid tag "/spring-boot-for-beginners:today": invalid reference format

Unexpected input(s) 'dockerfile', valid inputs are ['add-hosts', 'allow', 'build-args', 'build-contexts', 'builder', 'cache-from', 'cache-to', 'cgroup-parent', 'context', 'file', 'labels', 'load', 'network', 'no-cache', 'outputs', 'platforms', 'pull', 'push', 'secrets', 'secret-files', 'shm-size', 'ssh', 'tags', 'target', 'ulimit', 'github-token']

The `save-state` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The `save-state` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/