Improve caching of docker layers

[bajtos]

Rework Dockerfile to use the same structure as we have in spark-api: https://github.com/filecoin-station/spark-api/blob/main/Dockerfile

The current Dockerfile script is slowing down our deployment.

 => CACHED [build 1/5] RUN apt-get update -qq && 
    apt-get install -y python-is-python3 pkg-config build-essential                                                                                    
 => CACHED [build 2/5] COPY --link package.json package-lock.json .                                                                                                                                     
 => CACHED [build 3/5] RUN npm install --production=false                                                                                                                                               
 => [build 4/5] COPY --link . .                                                                                                                                                                         
 => [build 5/5] RUN npm prune --production

Notice that Docker loaded the first three layers from the cache. Then we copied the modified files, this was not cached as expected. As a result, layer 5 (the npm prune step) had to be recomputed again.

[Winter-Soren]

Hey @bajtos, I would like to take up this issue if it hasn't been resolved yet.

[bajtos]

Hey @bajtos, I would like to take up this issue if it hasn't been resolved yet.

Awesome, go for it!

[bajtos]

Please follow the convention we use in other spark repositories, for example:

• https://github.com/CheckerNetwork/spark-api/blob/8663a79f20c49d4d9b9e9db0c246f8f1f14b0110/Dockerfile#L24-L38
• https://github.com/CheckerNetwork/spark-deal-observer/blob/26c9ac1e9f4c82819a32407f3fc7605c3460f929/Dockerfile#L22-L37