init: Initial commit

Dockerfile

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+# Build stage
+FROM golang:1.25.5-alpine AS builder
+
+WORKDIR /build
+
+# Copy go mod files (for better caching)
+COPY app/go.mod app/go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY app/ ./
+
+# Build the application
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o gateway .
+
+# Runtime stage
+FROM alpine:latest
+
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /app
+
+# Copy binary from builder
+COPY --from=builder /build/gateway .
+
+# Copy configuration
+COPY gateway.yaml .
+
+# Expose port
+EXPOSE 8080
+
+# Run the gateway
+CMD ["./gateway"]