Setup Docker builds and optimize Dockerfile layers (#33)

* feat(ci): Setup docker builds for GUI

* refactor(ci):  Split dockerfile into layers

.github/workflows/build-image.yml

@@ -0,0 +1,65 @@
+name: Build Docker Image
+
+on:
+  push:
+    branches: [master]
+    tags: ["v*"]
+    paths-ignore:
+      - 'web/docs/**'
+      - 'web/landing/**'
+      - 'content/**'
+      - 'README.md'
+      - 'CONTRIBUTING.md'
+      - '.github/workflows/deploy-docs.yml'
+  pull_request:
+    branches: [master]
+    paths-ignore:
+      - 'web/docs/**'
+      - 'web/landing/**'
+      - 'content/**'
+      - '*.md'
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - 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: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}/omnia-gui
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha,format=short
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: apps/gui/Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          provenance: false