improved docker documentation for first time users

[bryanpedini]

as per the title, I improved a bit the documentation for docker user, explaining how to get the config file to avoid the following error at startup if launched with an empty config file

Application booted at Thu, 05 Sep 2024 14:16:09 GMT
file:///usr/src/app/src/index.mjs:22
Object.keys(config.repositories.github).forEach((type) => {
                                ^

TypeError: Cannot read properties of undefined (reading 'github')
    at file:///usr/src/app/src/index.mjs:22:33
    at ModuleJob.run (node:internal/modules/esm/module_job:193:25)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:527:24)
    at async loadESM (node:internal/process/esm_loader:91:5)
    at async handleMainPromise (node:internal/modules/run_main:65:12)

Node.js v18.9.1

or the following if launched without a file present at /usr/src/app/etc/config.js at all

Application booted at Thu, 05 Sep 2024 14:16:36 GMT
file:///usr/src/app/src/index.mjs:22
Object.keys(config.repositories.github).forEach((type) => {
                                ^

TypeError: Cannot read properties of undefined (reading 'github')
    at file:///usr/src/app/src/index.mjs:22:33
    at ModuleJob.run (node:internal/modules/esm/module_job:193:25)
    at async Promise.all (index 0)
    at async ESMLoader.import (node:internal/modules/esm/loader:527:24)
    at async loadESM (node:internal/process/esm_loader:91:5)
    at async handleMainPromise (node:internal/modules/run_main:65:12)

Node.js v18.9.1

[Ardakilic]

Hello, highly appreciate your contribution on this.

[bryanpedini]

wym fixing my mistake I noticed in the example? it would be ... cat /usr/src/app/etc/config.example.js > ... instead, I forgot the .example part

[Ardakilic]

Thanks, no worries, this commit should address it: https://github.com/Ardakilic/alerthub/commit/1e4fa91fffabccd3c886b813d0feb70734629ee9

Apologies nowadays I'm bloated with work stuff, so I cannot focus on my hobby projects much.