refacto, add docker image and add role platform react

[m-julio]

refacto 1 : rename vars files

• /group_vars directory should be at the same level as /inventory
• Files inside /group_vars directory should have the right extension (.yml)

refacto 2 : fix template inventories and simplify hosts

• Fill inventory template with missing hosts : "annotation_server" and "mediamtx_server"
• Delete hosts with suffix "-test" and "-prod" since it should be dealt with different inventories rather then different hosts
• Use always the same naming for mediamtx (not "mediamtx_server" and "mediamtx" depending on the playbook)
• Change name of inventory used in make file

Change: add dockerfile (and docker compose) to execute ansible commands

[MateoLostanlen]

Hello @m-julio , thanks for the PR, it looks good to me. Have you tested it by merging all the PRs on both repositories? Worst case, we can merge and then make a fix PR afterward, that might be simpler

[fe51]

Need to tag current version before merge.