Merge pull request #229 from lunakv/build-docker-images

Docker setup improvements

Author: Fryyyyy

.github/workflows/docker-build.yml

@@ -0,0 +1,47 @@
+name: Create and publish a Docker image
+
+on:
+  push:
+    branches:
+      - 'master'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to the container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+          tags: |
+            type=edge
+            type=sha
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.output.tags }}
+          labels: ${{ steps.meta.output.labels }}
+

Dockerfile

@@ -1,8 +1,17 @@
-FROM golang:1
+# Build stage
+FROM golang:1 AS builder
 WORKDIR /go/src/app
 
-COPY . .
+COPY go.mod go.sum ./
+RUN go mod download
 
-RUN go install -v
+COPY *.go ./
+RUN CGO_ENABLED=0 GOOS=linux go build -v -o /fryatog
 
-CMD ["fryatog"]
+# Final stage
+FROM alpine:latest
+WORKDIR /app
+# config.json is expected to be added as a mount
+COPY short_names.json ./ 
+COPY --from=builder /fryatog ./fryatog
+CMD ["./fryatog"]

docker-compose.yml

@@ -0,0 +1,9 @@
+services:
+    fryatog:
+        build: .
+        volumes:
+            - type: bind
+              source: ./config.json
+              target: /app/config.json
+              read_only: true
+

utils.go

@@ -212,11 +212,14 @@ func cappedMin(a, b, c int) int {
 }
 
 func readConfig() configuration {
-	file, _ := os.Open(configFile)
+	file, err := os.Open(configFile)
+	if err != nil {
+		panic(err)
+	}
 	defer file.Close()
 	decoder := json.NewDecoder(file)
 	conf := configuration{}
-	err := decoder.Decode(&conf)
+	err = decoder.Decode(&conf)
 	if err != nil {
 		panic(err)
 	}