fea: add discord functionality using lua

[marco-souza]

Changes

• fea: added golang functions to lua stack
• ref: env package
• ref: config package
• fea: add discord module in go
  • discord.send_message(channel, message): bool
  • discord.is_week_day(): bool
  • discord.auth_url: string
• enh: link discord module to lua
• fea: Alt+Entre submits code (ty @rafaellvs)
• fea: block unauthorized emails

References

• https://www.lua.org/pil/26.1.html
• https://stackoverflow.com/questions/37854422/how-to-create-table-in-table-in-lua-5-1-using-c-api
• https://docs.github.com/en/rest/users/emails?apiVersion=2022-11-28
• https://docs.github.com/en/rest/users/emails?apiVersion=2022-11-28#list-email-addresses-for-the-authenticated-user

discord.send_message(
  "960765222126704202", -- channel id (discord server must be authorized)
  "Olá pooovo, bora voltar com a Daily? ☀️!" -- message
)

Screenshot

Next Steps

• add secrets to fly.io
• Cronjob improvements #12
• Error Handling #11
• block users sing up

[vitorschelb]

Thats a great job Marco! Its gonna be really good for PodCodar! Lets shake this Discord!

[marco-souza]

lgtm

[rafaellvs]

🚀