agl@agl:~/Apuntes_HLC/Caronte/dockerfiles/sweb/nginx$ sudo docker build -t agl/ubuntubase -f Dockerfile . 2025/02/25 17:31:05 in: []string{} 2025/02/25 17:31:05 Parsed entitlements: [] [+] Building 0.1s (1/1) FINISHED docker:default => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 1.04kB 0.0s => WARN: InvalidDefaultArgInFrom: Default value for ARG ${AUTOR}/ubuntubase results in empty or invalid base image name (line 2) 0.0s

1 warning found (use docker --debug to expand):

• InvalidDefaultArgInFrom: Default value for ARG ${AUTOR}/ubuntubase results in empty or invalid base image name (line 2) Dockerfile:2

1 | ARG AUTOR 2 | >>> FROM ${AUTOR}/ubuntubase 3 | 4 |

ERROR: failed to solve: failed to parse stage name "/ubuntubase": invalid reference format exit status 1