Prepare backend Docker deployment for Hugging Face Spaces

.dockerignore

@@ -0,0 +1,9 @@
+.git
+.gitignore
+frontend
+backend/.env
+backend/creepurl.db
+backend/creepurl.db-shm
+backend/creepurl.db-wal
+**/node_modules
+**/dist

Dockerfile

@@ -0,0 +1,29 @@
+FROM golang:1.21-alpine AS builder
+
+WORKDIR /src
+
+COPY backend/go.mod backend/go.sum ./backend/
+WORKDIR /src/backend
+RUN go mod download
+
+COPY backend/ ./
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -o /out/creepurl main.go
+
+FROM alpine:3.20
+
+WORKDIR /app
+
+RUN adduser -D -u 10001 appuser && chown appuser:appuser /app
+
+COPY --from=builder --chown=appuser:appuser /out/creepurl ./creepurl
+COPY --chown=appuser:appuser backend/database ./database
+
+ENV PORT=7860
+ENV DB_PATH=./creepurl.db
+
+EXPOSE 7860
+
+USER appuser
+
+CMD ["./creepurl"]

backend/main.go

@@ -44,7 +44,7 @@ func main() {
 
 	port := os.Getenv("PORT")
 	if port == "" {
-		port = "8080"
+		port = "7860"
 	}
 
 	log.Printf("CreepURL API starting on port %s [%s]", port, cfg.Environment)