Creates Dockerfile & Build and Publish Workflow

.github/workflows/build.yaml

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+name: Build and Publish Docker Image
+
+on:
+  push:
+    branches: ['main']
+
+# Defines two custom environment variables for the workflow. These are used for the Container registry domain, and
+# a name for the Docker image that this workflow builds.
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+
+    # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Uses the `docker/login-action` action to log in to the Container registry registry using the account and
+      # password that will publish the packages. Once published, the packages are scoped to the account defined here.
+      - name: Log in to the Container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.USERNAME }}
+          password: ${{ secrets.TOKEN }}
+
+      # This step uses https://github.com/docker/metadata-action#about to extract tags and labels that will be applied
+      # to the specified image. The `id` "meta" allows the output of this step to be referenced in a subsequent step.
+      # The `images` value provides the base name for the tags and labels.
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      # This step uses the `docker/build-push-action` action to build the image, based on your repository's `Dockerfile`.
+      # If the build succeeds, it pushes the image to GitHub Packages. It uses the `context` parameter to define the
+      # build's context as the set of files located in the specified path. For more information, see 
+      # https://github.com/docker/build-push-action#usage in the README of the `docker/build-push-action` repository.
+      # It uses the `tags` and `labels` parameters to tag and label the image with the output of the "meta" step.
+      - name: Build and push Docker image
+        id: push
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+      
+      # This step generates an artifact attestation for the image, which is an unforgeable statement about where and
+      # how it was built. It increases supply chain security for people who consume the image. For more information,
+      # see: /actions/security-guides/using-artifact-attestations-to-establish-provenance-for-builds 
+      - name: Generate artifact attestation
+        uses: actions/attest-build-provenance@v1
+        with:
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          push-to-registry: true
+      

Dockerfile

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+FROM node:20.12-slim AS base
+
+# Update and install dependencies
+RUN apt-get update && apt-get install -y curl unzip && rm -rf /var/lib/apt/lists/*
+
+# Install Latest Bun
+RUN curl -fsSL https://bun.sh/install | bash
+ENV BUN_INSTALL="/root/.bun"
+ENV PATH="$BUN_INSTALL/bin:$PATH"
+
+# Frontend build stage
+FROM base AS frontend-build
+WORKDIR /app/frontend
+COPY frontend .
+RUN npm install
+RUN npm run build:prod
+
+# Copy built frontend into backend public directory
+FROM base AS backend-build
+WORKDIR /app/api
+RUN mkdir -p /app/api/public
+COPY --from=frontend-build /app/frontend/dist/* /app/api/public/
+
+# Backend build stage
+COPY api .
+RUN cp .env.example .env
+RUN bun install
+
+# Final image
+FROM base
+WORKDIR /app/api
+COPY --from=backend-build /app/api .
+EXPOSE 3001
+CMD ["bun", "run", "start"]