initial commit for docker build

[jasmingacic]

This build effectively will enable this sort of use of the CLI

docker run  --rm -ti  -v ${PWD}/basic.yml:/overlay.yaml overlay-cli

The idea is to be able to easily use overlay-cli in multiple platforms (linux, macos, win) and multiple cpu arch (arm, amd).
Ideally we could use vercel/pkg but that means packaging up to 6 different binaries into a single CLI app.

NOTE: While trying to build for platforms linux/arm/v7 llinux/arm64/v8 I found out that the official node image doesn't really work. Build was resulting in

 => ERROR [3/4] RUN npm install                                                                                                                                                                                   0.3s
------
 > [3/4] RUN npm install:
#0 0.266 exec /bin/sh: exec format error

Signed-off-by: jasmingacic [email protected]

[jasmingacic]

possible solution would be to run npm install here

Suggested change

	build:
	build:
	npm install

[jasmingacic]

if makefile runs npm install then there is no need for this line

[ponelat]

The full version of node is quite heavy, if we can get away with the alpine version, it would mean a much smaller docker image size. The only caveat is we may need to install git on the alpine version, as it does't come with that.

[jasmingacic]

also node_modules wouldn't have to be ignored if npm install is ran with make build

[ponelat]

Building within the docker environment has proven to be a good approach in other projects I've worked in, as it means the host only needs Docker installed. Helps with Ci/CD pipelinles, etc.

[ponelat]

There are a few things we can do to make a production ready docker image of this. I've scattered some notes on the conversations. And can find another nodejs project that we can still the docker set up from.

Thanks for kicking this off!

[ponelat]

Building within the docker environment has proven to be a good approach in other projects I've worked in, as it means the host only needs Docker installed. Helps with Ci/CD pipelinles, etc.

[ponelat]

The full version of node is quite heavy, if we can get away with the alpine version, it would mean a much smaller docker image size. The only caveat is we may need to install git on the alpine version, as it does't come with that.

[ponelat]

We can set the command to be bin.js, that way it's possible to make use of stdin and we may not need to mount files. Although mounting files may prove useful later on.

[jasmingacic]

This was more of a suggestion on how to do it. I'm happy with any way you think would work the best. For example when we use this we are running command:

docker run --rm -v=${PWD}/overlay.yaml:/overlay.yaml -v=${PWD}/test.yaml:/test.yaml jasmingacic/overlay-cli

We can adjust to run it any other way.

And you are absolutely right about the docker image I used here. Current size is about 140MB. I'm not well versed with Node so I took the first thing I found.

Do you want me to add those changes?