Add GitHub Actions workflow to build and push Docker images to ghcr.io (#7)

* feat: add GitHub Actions workflow to build and push Docker images to ghcr.io

Co-authored-by: Skitionek <22711241+Skitionek@users.noreply.github.com>

Author: Copilot

.github/workflows/build-images.yml

@@ -0,0 +1,95 @@
+name: Build and Push Docker Images
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: Build ${{ matrix.image }}
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - image: kg-appserver
+            context: appserver
+
+          - image: kg-webserver
+            context: client
+            build-args: |
+              ANGULAR_CONFIG=production
+              YARN_INSTALL_OPTS=--frozen-lockfile
+
+          - image: kg-statistical-enrichment
+            context: statistical-enrichment
+
+          - image: kg-cache-invalidator
+            context: cache-invalidator
+
+          - image: filebeat
+            context: filebeat
+
+          - image: elasticsearch
+            context: elasticsearch
+
+          - image: logstash
+            context: logstash
+
+          - image: metricbeat
+            context: metricbeat
+
+          - image: arangodb
+            context: arangodb
+
+          - image: graph-db-migrator
+            context: graph-db/migrator
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}/${{ matrix.image }}
+          tags: |
+            type=sha,prefix=,format=short
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ${{ matrix.context }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: ${{ matrix.build-args }}
+          cache-from: type=gha,scope=${{ matrix.image }}
+          cache-to: type=gha,mode=max,scope=${{ matrix.image }}