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Optimize Dockerfile

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This optimizes the Dockerfile a bit by;

- putting the docs archives at the top to
  optimize caching and to prevent having
  to clone the github repository on each
  build. Note that '--no-cache' is needed
  to forcefully break the cache, but the
  archives should not frequently change
- grouping RUN lines to reduce image size.
- using a loop for the archived versions to
  reduce the amount of duplicated code.
- using the local files for the *current*
  version of the docs instead of the git
  clone from GitHub. this makes it also
  use the right source instead of "master"
- adding a .dockerignore to prevent busting
  the cache if not needed, and to prevent
  uploading the '.git' repository, which
  is not used for the "current" docs

Difference in size before/after;

    REPOSITORY     TAG     IMAGE ID      CREATED         SIZE
    docs           latest  36f6ad029e6a  3 minutes ago   1.722 GB
    docs-orig      latest  4f1a3e3fda4f  16 minutes ago  3.344 GB

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn
2016-11-21 21:18:57 +01:00
parent 57fcd95be9
commit 721f9d2aba
3 changed files with 25 additions and 79 deletions
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.dockerignore Normal file
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.dockerignore
.git
.gitignore
Dockerfile
docker-compose.yml