heroku workflows

.github/workflows/main.yml

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+name: CI
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build Docker image
+        run: docker build -t registry.heroku.com/${{ secrets.HEROKU_APP }}/web:latest .
+
+      - name: Docker image info
+        run: docker images
+
+      - name: Login to container registry
+        env:
+          HEROKU_API_KEY: ${{ secrets.HEROKU_API_KEY }}
+        run: heroku container:login
+
+      - name: Push Docker image
+        run: docker push registry.heroku.com/${{ secrets.HEROKU_APP }}/web
+
+      - name: Release
+        env:
+          HEROKU_API_KEY: ${{ secrets.HEROKU_API_KEY }}
+        run: heroku container:release -a ${{ secrets.HEROKU_APP }} web

Dockerfile

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+# Use a Rust image with a specific version
+FROM rust:1.60 as build
+
+# Set the working directory inside the container
+WORKDIR /holy
+
+# Copy only the necessary files for dependency resolution
+COPY ./Cargo.lock ./Cargo.lock
+COPY ./Cargo.toml ./Cargo.toml
+
+# Build dependencies only (to cache them)
+RUN cargo build --release
+
+# Copy the rest of your application source code
+COPY ./src ./src
+
+# Build the application
+RUN cargo build --release
+
+# Start a new build stage
+FROM debian:buster-slim
+
+# Copy the built binary from the previous stage
+COPY --from=build /holy/target/release/holy .
+
+# Set the command to run your binary
+CMD ["./holy"]