feat: Docker Support 🐳 (#11)

* feat: added dockerfile and relvant docs

* feat: added ci to publish docker images

* chore: bumped all checkout actions to v4

* chore: removed unnecessary deps from build stage

* chore: changed build targets to amd64 and arm64 only

* chore: moved docker publish logic to push trigger

Switched the docker image build/publish pipeline event to a push event
on either a `v*` tag or to the main branch.

* fix: README

* feat: publish => docker

* feat: dont run on main push

lets only publish releases instead

---------

Co-authored-by: Evangelos Paterakis <evan@geopjr.dev>

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install Crystal
         uses: crystal-lang/install-crystal@v1
       - name: Install shards

.github/workflows/docker.yml

@@ -0,0 +1,45 @@
+name: Docker
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  publish-docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Container Metadata
+        id: metadata
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ghcr.io/${{ github.repository_owner }}/blahaj
+          tags: |
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+      - name: Build and Push Container
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: Dockerfile
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.metadata.outputs.tags }}
+          labels: ${{ steps.metadata.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/release.yml

@@ -1,5 +1,7 @@
 name: Release
+
 on: workflow_dispatch
+
 jobs:
   build_linux_static:
     runs-on: ubuntu-latest
@@ -7,10 +9,10 @@ jobs:
       image: crystallang/crystal:latest-alpine
     steps:
       - name: Download source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Retrieve version
         run: |
-          echo "::set-output name=VERSION::$(shards version)"
+          echo "VERSION=$(shards version)" >> "$GITHUB_OUTPUT"
         id: version
       - name: Build
         run: make static_mt
@@ -26,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build_linux_static
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/download-artifact@v2
         with:
           path: ./GH_ARTIFACTS

Dockerfile

@@ -0,0 +1,10 @@
+FROM --platform=linux/amd64 crystallang/crystal:latest-alpine as builder
+
+WORKDIR /root/src
+COPY . . 
+RUN shards build --production --no-debug --release -Dpreview_mt --static
+
+
+FROM scratch
+COPY --from=builder  /root/src/bin/blahaj /usr/local/bin/blahaj
+ENTRYPOINT [ "blahaj" ]

README.md

@@ -32,6 +32,12 @@ They are built & published by our lovely [actions](https://github.com/GeopJr/BLA
 
 Arch Linux users can install the [blahaj](https://aur.archlinux.org/packages/blahaj) (or the [blahaj-git](https://aur.archlinux.org/packages/blahaj-git)) AUR package.
 
+### Docker
+
+```
+docker run --rm -it --name blahaj ghcr.io/geopjr/blahaj -h
+```
+
 ### Building
 
 #### Dependencies