Move docker container build onto GH actions

.github/workflows/docker.yaml

@@ -0,0 +1,51 @@
+name: Build Docker Image
+
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - id: extract_branch
+        name: Extract branch name
+        shell: bash
+        run: echo "branch=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}" >> $GITHUB_OUTPUT
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GHCR (GitHub Packages)
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push dev containers
+        uses: docker/build-push-action@v5
+        if: github.event_name == 'pull_request'
+        with:
+          push: true
+          tags: |
+            mrcide/naomi:${{steps.extract_branch.outputs.branch}}
+            ghcr.io/${{github.repository}}:${{steps.extract_branch.outputs.branch}}
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        if: github.event_name != 'pull_request'
+        with:
+          push: true
+          tags: |
+            mrcide/naomi:latest
+            mrcide/naomi:${{steps.extract_branch.outputs.branch}}
+            ghcr.io/${{github.repository}}:latest
+            ghcr.io/${{github.repository}}:${{steps.extract_branch.outputs.branch}}