Optimize docker image size

[urielsalis]

Completly untested, this should reduce the image size by quite a bit

If someone doesnt get to testing it, I can try in a few hours

[urielsalis]

Final image size is 149mb vs 1.02gb

[LordRalex]

Starting Modmail v3.6.1 (358a116) on Node.js 14.21.1 (arm64)
Loaded 14 values from environment variables
Configuration ok!
Using an SQLite database:
/usr/src/modmailbot/db/data.sqlite
�
n
$ npm install sqlite3 --save
Cannot find module '@mapbox/node-pre-gyp'
Require stack:

• /usr/src/modmailbot/node_modules/sqlite3/lib/sqlite3-binding.js
• /usr/src/modmailbot/node_modules/sqlite3/lib/sqlite3.js
• /usr/src/modmailbot/node_modules/knex/lib/dialects/sqlite3/index.js
• /usr/src/modmailbot/node_modules/knex/lib/dialects/index.js
• /usr/src/modmailbot/node_modules/knex/lib/knex-builder/internal/config-resolver.js
• /usr/src/modmailbot/node_modules/knex/lib/knex-builder/Knex.js
• /usr/src/modmailbot/node_modules/knex/lib/index.js
• /usr/src/modmailbot/node_modules/knex/knex.js
• /usr/src/modmailbot/src/knex.js
• /usr/src/modmailbot/src/main.js
• /usr/src/modmailbot/src/index.js
  Error: Cannot find module '@mapbox/node-pre-gyp'
  Require stack:
• /usr/src/modmailbot/node_modules/sqlite3/lib/sqlite3-binding.js
• /usr/src/modmailbot/node_modules/sqlite3/lib/sqlite3.js
• /usr/src/modmailbot/node_modules/knex/lib/dialects/sqlite3/index.js
• /usr/src/modmailbot/node_modules/knex/lib/dialects/index.js
• /usr/src/modmailbot/node_modules/knex/lib/knex-builder/internal/config-resolver.js
• /usr/src/modmailbot/node_modules/knex/lib/knex-builder/Knex.js
• /usr/src/modmailbot/node_modules/knex/lib/index.js
• /usr/src/modmailbot/node_modules/knex/knex.js
• /usr/src/modmailbot/src/knex.js
• /usr/src/modmailbot/src/main.js
• /usr/src/modmailbot/src/index.js
  at Function.Module._resolveFilename (internal/modules/cjs/loader.js:902:15)
  at Function.Module._load (internal/modules/cjs/loader.js:746:27)
  at Module.require (internal/modules/cjs/loader.js:974:19)
  at require (internal/modules/cjs/helpers.js:101:18)
  at Object. (/usr/src/modmailbot/node_modules/sqlite3/lib/sqlite3-binding.js:1:16)
  at Module._compile (internal/modules/cjs/loader.js:1085:14)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
  at Module.load (internal/modules/cjs/loader.js:950:32)
  at Function.Module._load (internal/modules/cjs/loader.js:790:12)
  at Module.require (internal/modules/cjs/loader.js:974:19)
  Error: Error: Knex: run
  $ npm install sqlite3 --save
  Cannot find module '@mapbox/node-pre-gyp'
  Require stack:
• /usr/src/modmailbot/node_modules/sqlite3/lib/sqlite3-binding.js
• /usr/src/modmailbot/node_modules/sqlite3/lib/sqlite3.js
• /usr/src/modmailbot/node_modules/knex/lib/dialects/sqlite3/index.js
• /usr/src/modmailbot/node_modules/knex/lib/dialects/index.js
  ...stack trace truncated to 8 lines