Use Dockerfile to build Pakkero

[alfonmga]

A Dockerfile would propose a solution to issues like #2 and #3.

[89luca89]

Thanks for the pull @alfonmga !

Testing locally works well with both docker and podman

Could we add the upx dependency to enable compression?

EDIT: also you can add both docker and podman instructions in README as it works fine :)

[alfonmga]

Podman (version 3.0.1) worked for me too on an Ubuntu 20.04.2 LTS local box.

I didn't know about Podman so thanks a lot for mentioning it :)

[89luca89]

Super thanks a lot @alfonmga

Can I suggest to use alpine for the docker image?

With this dockerfile:

FROM golang:alpine

ENV CGO_ENABLED=0
ENV GO111MODULE=off

RUN apk add --update-cache upx git make binutils coreutils \
    && rm -rf /var/cache/apk/*

RUN upx --version

RUN go version
RUN go get -d -v github.com/89luca89/pakkero

WORKDIR $GOPATH/src/github.com/89luca89/pakkero
RUN make

RUN ./dist/pakkero -v

ENTRYPOINT ["./dist/pakkero"]

It generates a working image that clocks at ~370mb vs 914mb of standard debian based one :)

EDIT: yea Podman is great and comes standard in Fedora based distro :) so confirmed also working on podman fedora and ubuntu great 👍

[alfonmga]

Super thanks a lot @alfonmga

Can I suggest to use alpine for the docker image?

With this dockerfile:

FROM golang:alpine

ENV CGO_ENABLED=0
ENV GO111MODULE=off

RUN apk add --update-cache upx git make binutils coreutils \
    && rm -rf /var/cache/apk/*

RUN upx --version

RUN go version
RUN go get -d -v github.com/89luca89/pakkero

WORKDIR $GOPATH/src/github.com/89luca89/pakkero
RUN make

RUN ./dist/pakkero -v

ENTRYPOINT ["./dist/pakkero"]

It generates a working image that clocks at ~370mb vs 914mb of standard debian based one :)

EDIT: yea Podman is great and comes standard in Fedora based distro :) so confirmed also working on podman fedora and ubuntu great 👍

I prefer to use Alpine Linux distribution too. But recently I never go for it because I remember an article that I read some time ago, so I always go for a non-Alpine image because of that :)

Anyways, in this case everything works as expected, the built image size is smaller and build time is faster, as we would expect from an Alpine image. I committed the change.

[89luca89]

Great thnks @alfonmga merging 👍

About the image size, yes the problem it's mainly on python images