chore: update Dockerfile to reduce the image size

[tdurieux]

Hi there,

I've made a small improvement to the Dockerfile that I think could help optimize the image size.

Summary of the changes:

• I added the --no-install-recommends to with apt-get in order to not install unnecessary packages and reduce the image size.
• I put apt-get update and apt-get install in a single layer to optimize the layers and reduce the number of unneeded files
• I added rm -rf /var/lib/apt/lists/* after apt-get install which removes unnecessary files and reduces the size of the image.

Impact on the image size:

• Image size before repair: 186.45 MB
• Image size after repair: 148.73 MB
• Difference: 37.72 MB (20.23%)

I hope that you will find these changes useful to you. Let me know if you have any questions or concerns.

Thanks,