Setup build for dev and prod

[shinnokdisengir]

Unified Dockerfile

All Dockerfiles in the project - apps - have been merged into one, as they were identical in 99% of their content. In addition, the new file configuration allows the develop section of docker compose to allow watch, with hotcode-reloading for those who need to develop

• The common Dockerfile has been placed in the project root
• All the Dockerfiles in the various app have been removed
• The deps and builder stages allow you to compile dependencies and have the code inside the container, without having built the release. This allows you to run mix run --no-halt or mix phx.server in the container
• Prod only: the new containers also have a symlink with a common path /app/astarte-service pointing directly to the service. This allows the service to be started without knowing the name
• Prod only: if the app project folder has entrypoint.sh, the commands in that file will be started instead the service itself. To run the service using the script, entrypoint.sh must have exec "$@"

To build a container (default env is prod), you have to use the common Dockerfile in the app context:

docker build -f ../../Dockerfile .

To build in a different environment:

docker build --build-arg BUILD_ENV=dev -f ../../Dockerfile . docker build --build-arg BUILD_ENV=test -f ../../Dockerfile .

docker compose dev section

docker compose is now capable of starting containers in dev mode, without creating the release.

The previous docker-compose.yml file now points to the common Dockerfile located at the root of Astarte (see previous commit) A new docker-compose.dev.yml has been added, which, if started in cascade with the first, allows for the creation of a development environment for Astarte with the possibility of hot-reloading and rebuild, with each code change To start the dev mode functionality, according to the specifications (https://docs.docker.com/compose/multiple-compose-files/merge/)

docker compose -f docker-compose.yml -f docker-compose.dev.yml watch

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 69.49%. Comparing base (1a9c203) to head (87d67d4). Report is 5 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #956 +/- ## ========================================== + Coverage 67.99% 69.49% +1.50% ========================================== Files 281 267 -14 Lines 7420 6613 -807 ========================================== - Hits 5045 4596 -449 + Misses 2375 2017 -358 ```

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