misc: better dockerfile

.gitea/workflows/docker-build.yml

@@ -0,0 +1,37 @@
+name: Docker Image CI
+
+on:
+  workflow_dispatch:
+  push:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.abunchofknowitalls.com
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: git.abunchofknowitalls.com/${{ gitea.repository }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,17 +1,23 @@
-FROM rust:1.84.0 as build
+FROM rust:1.92 AS builder
 
 RUN rustup target add x86_64-unknown-linux-musl && \
-    apt update && \
+    apt-get update && \
-    apt install -y musl-tools musl-dev iputils-ping && \
+    apt-get install -y --no-install-recommends musl-tools musl-dev iputils-ping ca-certificates && \
-    update-ca-certificates
+    rm -rf /var/lib/apt/lists/*
 
-COPY ./src ./src
+WORKDIR /app
-COPY ./Cargo.lock .
+COPY Cargo.toml Cargo.lock ./
-COPY ./Cargo.toml .
+COPY src ./src
 
 RUN cargo build --target x86_64-unknown-linux-musl --release
 
+FROM scratch AS runtime
+
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /app/target/x86_64-unknown-linux-musl/release/status-checker /status-checker
+COPY --from=builder /usr/bin/ping /usr/bin/ping
+
 ENV ROCKET_ADDRESS=0.0.0.0
 ENV ROCKET_PORT=8000
 
-ENTRYPOINT ["./target/x86_64-unknown-linux-musl/release/status-checker"]
+ENTRYPOINT ["/status-checker"]