feat: add gh-action to publish docker image

This Action Publishes a Docker image of the project to the Github Container Registry for the repo.
Also does neat tagging with versions :)

chore: shift publish workflow to proper directory

chore: fix label in Dockerfile

.github/workflows/changelog.yml

@@ -20,6 +20,8 @@ jobs:
           github-token: ${{ secrets.ACCESS_TOKEN }}
           version-file: './pyproject.toml'
           version-path: 'tool.poetry.version'
+          fallback-version: "0.0.1"
+          release-count: 0
           output-file: 'CHANGELOG.md'
 
       - name: Create Release

.github/workflows/publish.yml

@@ -0,0 +1,36 @@
+name: Publish Docker image
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to GitHub Packages
+    runs-on: ubuntu-latest
+    steps:
+      - name: check out the repo
+        uses: actions/checkout@v2
+      - name: get project version
+        id: get_version
+        run: |
+          echo ::set-output name=version_tag::$(awk -F'[ ="]+' '$1 == "version" { print $2 }' pyproject.toml)
+          echo "project version - v${{ steps.get_version.outputs.version_tag }}"
+      - name: version dockerfile
+        run: sed -i 's/v0.0.0/v${{ steps.get_version.outputs.version_tag}}/g' Dockerfile
+      - name: set up Docker builder
+        uses: docker/setup-buildx-action@v1
+      - name: log into GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: push to Github Container Registry
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: |
+            ghcr.io/heptagram-bot/api:v${{ steps.get_version.outputs.version_tag}}
+            ghcr.io/heptagram-bot/api:latest

Dockerfile

@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1
 
 FROM python:3.8-slim-buster
-LABEL org.opencontainers.image.source https://github.com/Heptagram-Bot/api
+LABEL org.opencontainers.image.source https://github.com/heptagram-bot/api
 
 # Setup env
 ENV LANG C.UTF-8