Multi-arch docker image support (#124)

* chore: Update Docker multi-arch build workflow

* chore: Clean up old Docker images in multi-arch build workflow

* Switched to use single Dockerfile configured for multi-arch

* Revert "Switched to use single Dockerfile configured for multi-arch"

* chore: Update readme with new instructions for cpu arch, remove Dockerfile 
due to migration to individual dockerfiles per arch

* fix: incorrect location of arch message

.github/workflows/docker.yml

@@ -20,10 +20,49 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Build and push Docker image
+      - name: Build and push Docker image for ARM64
         uses: docker/build-push-action@v5
         with:
+          platforms: linux/arm64
           push: true
+          file: docker/Dockerfile.arm64
+          tags: |
+            discuit/discuit:${{ github.sha }}-arm64
+
+      - name: Build and push Docker image for AMD64
+        uses: docker/build-push-action@v5
+        with:
+          platforms: linux/amd64
+          push: true
+          file: docker/Dockerfile.amd64
+          tags: |
+            discuit/discuit:${{ github.sha }}-amd64
+
+      - name: Create and push Docker manifest
+        uses: int128/docker-manifest-create-action@v2
+        with:
           tags: |
             discuit/discuit:latest
             discuit/discuit:${{ github.sha }}
+          sources: |
+            discuit/discuit:${{ github.sha }}-arm64
+            discuit/discuit:${{ github.sha }}-amd64
+
+      - name: Authenticate and obtain Docker Hub JWT token (for cleanup)
+        id: get_token
+        run: |
+          TOKEN=$(curl -s -H "Content-Type: application/json" \
+          -X POST -d '{"username": "${{ secrets.DOCKERHUB_USERNAME }}", "password": "${{ secrets.DOCKERHUB_TOKEN }}"}' \
+          https://hub.docker.com/v2/users/login/ | jq -r .token)
+          echo "::add-mask::$TOKEN" # Mask the token in the logs
+          echo "TOKEN=$TOKEN" >> $GITHUB_ENV
+        env:
+          DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+          DOCKERHUB_TOKEN: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Clean up old images
+        env:
+          TOKEN: ${{ env.TOKEN }}
+        run: |
+          curl -s -H "Authorization: JWT $TOKEN" -X DELETE "https://hub.docker.com/v2/repositories/discuit/discuit/tags/${{ github.sha }}-arm64/"
+          curl -s -H "Authorization: JWT $TOKEN" -X DELETE "https://hub.docker.com/v2/repositories/discuit/discuit/tags/${{ github.sha }}-amd64/"

README.md

@@ -90,17 +90,19 @@ Note: Do not install the discuit binary using go install or move it somewhere el
 
 1. **Build the Docker Image**
 
-   ```shell
-   docker build -t discuit .
-   ```
+    > **Note**: If you need to run discuit on a different architecture, simply change the Dockerfile in the `-f` flag to the appropriate Dockerfile for your architecture, currently we support `linux/amd64` (docker/Dockerfile.amd64), and `linux/arm64` (docker/Dockerfile.arm64).
+
+    ```shell
+    docker build -t discuit -f docker/Dockerfile.amd64 .
+    ```
 
 2. **Run the Docker Container**
 
-   > **Note**: The following command while having a persistent database, the included config.yaml file is not. You will need to mount the file to the container if you want to persist the configuration.
+    > **Note**: The following command while having a persistent database, the included config.yaml file is not. You will need to mount the file to the container if you want to persist the configuration.
 
-   ```shell
-   docker run -d --name discuit -v discuit-db:/var/lib/mysql -v discuit-redis:/var/lib/redis -v discuit-images:/app/images -p 8080:80 discuit
-   ```
+    ```shell
+    docker run -d --name discuit -v discuit-db:/var/lib/mysql -v discuit-redis:/var/lib/redis -v discuit-images:/app/images -p 8080:80 discuit
+    ```
 
 3. **Accessing Discuit**: After the container starts, you can access Discuit by navigating to `http://localhost:8080` on your web browser, or to the specific port if you customized the port mapping.
 

docker/Dockerfile.arm64

@@ -0,0 +1,64 @@
+# Use official Go image for the backend build
+FROM golang:1.21 AS backend-builder
+
+# Install runtime dependencies (libvips)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libvips-dev && \
+    libvips=8.8.4 && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Set the environment variables for the build
+ENV GOOS=linux
+ENV GOARCH=arm64
+
+# Copy the source code and build the backend
+WORKDIR /app
+COPY go.* ./
+RUN go mod download
+COPY . .
+RUN go build -ldflags "-s -w" -o discuit .
+
+# Use official Node image for the frontend build
+FROM node:18 AS frontend-builder
+
+# Copy required configuration files and build files
+WORKDIR /app
+COPY config.default.yaml .
+RUN mv config.default.yaml config.yaml
+COPY --from=backend-builder /app/discuit /app/discuit
+
+# Copy the source code and build the frontend
+WORKDIR /app/ui
+COPY ui/package*.json ./
+RUN npm ci
+COPY ui/ . 
+
+# Final stage: setup the runtime environment
+FROM node:18
+# Avoid prompts from the package manager during build
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    mariadb-server \
+    redis-server \
+    libvips-dev && \
+    libvips=8.8.4 && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# Copy built artifacts from previous stages
+COPY --from=frontend-builder /app/ui /app/ui
+COPY --from=backend-builder /app/discuit /app/discuit
+COPY config.default.yaml /app/config.yaml
+COPY migrations /app/migrations
+COPY docker/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+WORKDIR /app
+
+# Setup the environment and ports
+EXPOSE 80
+ENTRYPOINT ["/entrypoint.sh"]
+CMD ["/app/discuit", "serve"]