Use multi-stage build in Dockerfile

[Gnuxie]

Fixes #300

I also tried to use alpine again but rust-crypto is still fucky

with gcompat:

/node_modules/@matrix-org/matrix-sdk-crypto-nodejs/index.js:250
    throw loadError
    ^

Error: Error relocating /node_modules/@matrix-org/matrix-sdk-crypto-nodejs/matrix-sdk-crypto.linux-x64-musl.node: __register_atfork: symbol not found
    at Module._extensions..node (node:internal/modules/cjs/loader:1586:18)
    at Module.load (node:internal/modules/cjs/loader:1288:32)
    at Module._load (node:internal/modules/cjs/loader:1104:12)
    at Module.require (node:internal/modules/cjs/loader:1311:19)
    at require (node:internal/modules/helpers:179:18)
    at Object.<anonymous> (/node_modules/@matrix-org/matrix-sdk-crypto-nodejs/index.js:175:31)
    at Module._compile (node:internal/modules/cjs/loader:1469:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1548:10)
    at Module.load (node:internal/modules/cjs/loader:1288:32)
    at Module._load (node:internal/modules/cjs/loader:1104:12) {
  code: 'ERR_DLOPEN_FAILED'
}

without gcompat:

/node_modules/@matrix-org/matrix-sdk-crypto-nodejs/index.js:250
    throw loadError
    ^

Error: Error loading shared library ld-linux-x86-64.so.2: No such file or directory (needed by /node_modules/@matrix-org/matrix-sdk-crypto-nodejs/matrix-sdk-crypto.linux-x64-musl.node)
    at Module._extensions..node (node:internal/modules/cjs/loader:1586:18)
    at Module.load (node:internal/modules/cjs/loader:1288:32)
    at Module._load (node:internal/modules/cjs/loader:1104:12)
    at Module.require (node:internal/modules/cjs/loader:1311:19)
    at require (node:internal/modules/helpers:179:18)
    at Object.<anonymous> (/node_modules/@matrix-org/matrix-sdk-crypto-nodejs/index.js:175:31)
    at Module._compile (node:internal/modules/cjs/loader:1469:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1548:10)
    at Module.load (node:internal/modules/cjs/loader:1288:32)
    at Module._load (node:internal/modules/cjs/loader:1104:12) {
  code: 'ERR_DLOPEN_FAILED'
}

Testing was done locally by using docker run --rm -it --network=host -v "/home/user/experiments/Draupnir/test/harness/mjolnir-data:/data" --name=draupnir draupnir-multi-stage bot --draupnir-config /data/config/production.yaml

[MTRNord]

Hm I think you can then remove the version steps in the CI workflows right? 🤔

[Gnuxie]

Hm I think you can then remove the version steps in the CI workflows right? 🤔

nah, we don't use the Dockerfile. OH right for release? yeah

[Gnuxie]

@MTRNord I think we just leave at this for now and improve later, what do you think?

[MTRNord]

@MTRNord I think we just leave at this for now and improve later, what do you think?

sure. Whatever works for you :) making good DraupnirDockerimages is hard anyway.