Oh right, sorry, I thought it was obvious that you have to 'rebuild' the image when a code changes. But if you have a "COPY src/ /app" as the last command in yo

Oh right, sorry, I thought it was obvious that you have to 'rebuild' the image when a code changes. But if you have a "COPY src/ /app" as the last command in your dockerfile then that's not an expensive operation as all the previous ones are cached. Unless you change your system packages or add a new line to your requirements.txt, in which case the cache would be invalidated and the build takes longer. But... it's done by your CI server anyway, so...