How can I set up a multi-stage Docker build in Travis CI?

How can I set up a multi-stage Docker build in Travis CI?

To set up a multi-stage Docker build in Travis CI, you need to define your stages in the Dockerfile and configure your .travis.yml file accordingly.

Can you give me an example of a .travis.yml file for that?

Sure! Here's a simple example:

language: generic
services:
  - docker

script:
  - docker build -t myapp:latest .
  - docker build --target production -t myapp:production .

What are the benefits of using multi-stage builds?

Multi-stage builds help reduce the final image size, improve build times, and keep your images clean by separating build dependencies from runtime dependencies.

Is there a way to cache layers in Travis CI?

Yes, you can use the cache feature in Travis CI to cache Docker layers, which can speed up your builds significantly.