Add CI Action for container build

This will have a container image built and pushed automatically on any
new commit to `trunk`. Containers expect a volume mounted on
`/var/lib/webhook-gateway` with a `config.toml` file added in.

.github/workflows/container.yaml

@@ -0,0 +1,40 @@
+name: WebHook Gateway Container Build
+on:
+  push:
+    branches:
+      - trunk
+  pull_request:
+    branches:
+      - trunk
+env:
+  CONTAINER_NAME: ${{ github.repository_owner }}/webhook-gateway
+  CONTAINER_TAG: latest
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Container Build
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y podman buildah
+      - name: Build container image
+        id: build-image
+        uses: redhat-actions/buildah-build@v2
+        with:
+          image: ${{ env.CONTAINER_NAME }}
+          tags: ${{ env.CONTAINER_TAG }}
+          containerfiles: Containerfile
+      - name: Push to container registry
+        id: push-to-registry
+        uses: redhat-actions/push-to-registry@v2
+        with:
+          registry: ${{ vars.CONTAINER_REGISTRY_URL }}
+          image: ${{ steps.build-image.outputs.image }}
+          tags: ${{ steps.build-image.outputs.tags }}
+          username: ${{ secrets.CONTAINER_REGISTRY_USERNAME }}
+          password: ${{ secrets.CONTAINER_REGISTRY_PASSWORD }}
+      - name: Print container image URL
+        run: echo "Image pushed to ${{ steps.push-to-registry.outputs.registry-paths }}"

Containerfile

@@ -1,15 +1,15 @@
 FROM docker.io/golang:1.23-bookworm AS builder
-
-RUN GOBIN=/build/usr/bin go install go.deuill.org/webhook-gateway@latest
-COPY gateway.conf /build/etc/webhook-gateway/config.conf
+RUN GOBIN=/build/usr/bin go install go.deuill.org/webhook-gateway/cmd/webhook-gateway@latest
 
 FROM docker.io/debian:bookworm-slim
 RUN apt-get update -y && apt-get upgrade -y && apt-get install -y --no-install-recommends \
     ca-certificates
 
 RUN adduser --system --group --no-create-home webhook-gateway
 
+VOLUME /var/lib/webhook-gateway
+
 COPY --from=builder /build /
 USER webhook-gateway
 
-ENTRYPOINT ["/usr/bin/webhook-gateway", "-config", "/etc/webhook-gateway/config.conf"]
+ENTRYPOINT ["/usr/bin/webhook-gateway", "-config", "/var/lib/webhook-gateway/config.toml"]

README.md

@@ -25,8 +25,8 @@ The `webhook-gateway` binary should be placed in your `$GOBIN` path.
 ## Configuration
 
 Configuration is made entirely via a single TOML file, a full example of which can be found
-[here](gateway.conf). In general, providing a configuration file is mandatory as options don't
-(generally) have defaults set; only a number of options are required, though. The following
+[here](config.example.toml). In general, providing a configuration file is mandatory as options
+don't (generally) have defaults set; only a number of options are required, though. The following
 sections are available:
 
 ### `http`

cmd/webhook-gateway/main.go

@@ -20,7 +20,7 @@ import (
 
 // Global configuration.
 var (
-	configPath = flag.String("config", "gateway.conf", "Path to main configuration file, in TOML format.")
+	configPath = flag.String("config", "config.toml", "Path to main configuration file, in TOML format.")
 	logLevel   = flag.String("log-level", "info", "The minimum log level to process logs under")
 )