Update Dockerfile CMD

[Tristan-WorkGH]

Modify the default container output with a clear message instead of running an arbitrary script in dry-run mode, and escape a possible bug in said script.

Please specify the script to run in the container CMD.

[Tristan-WorkGH]

When analysing the parent image, we can see that we don't have an entrypoint with alpine image:

$ docker pull python:3.8.12-alpine
3.8.12-alpine: Pulling from library/python
59bf1c3509f3: Pull complete 
07a400e93df3: Pull complete 
2bbaed1c11d1: Pull complete 
9cbeadc4f598: Pull complete 
449a9c3cb364: Pull complete 
Digest: sha256:7c5cf4ffe8a16be5166a197eac378e802e5fbccfe958bd397cb90960916e8985
Status: Downloaded newer image for python:3.8.12-alpine
docker.io/library/python:3.8.12-alpine

$ docker inspect -f '{{json .Config}}' python:3.8.12-alpine | jq
{
  "Hostname": "",
  "Domainname": "",
  "User": "",
  "AttachStdin": false,
  "AttachStdout": false,
  "AttachStderr": false,
  "Tty": false,
  "OpenStdin": false,
  "StdinOnce": false,
  "Env": [
    "PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
    "LANG=C.UTF-8",
    "GPG_KEY=E3FF2839C048B25C084DEBE9B26995E310250568",
    "PYTHON_VERSION=3.8.12",
    "PYTHON_PIP_VERSION=21.2.4",
    "PYTHON_SETUPTOOLS_VERSION=57.5.0",
    "PYTHON_GET_PIP_URL=https://github.com/pypa/get-pip/raw/38e54e5de07c66e875c11a1ebbdb938854625dd8/public/get-pip.py",
    "PYTHON_GET_PIP_SHA256=e235c437e5c7d7524fbce3880ca39b917a73dc565e0c813465b7a7a329bb279a"
  ],
  "Cmd": [
    "python3"
  ],
  "Image": "sha256:dcb47108d0c702d489dd9c99d54fa2c16c74cb948ee0eecd941d28b92de6d0a5",
  "Volumes": null,
  "WorkingDir": "",
  "Entrypoint": null,
  "OnBuild": null,
  "Labels": null
}

so we can even simplify the CMD for only specifying python args.

It mean that we don't need to specify "python" in the CMD, for CLI and docker-compose.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud