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Dockerfile

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+# Build stage
+FROM golang:1.21-alpine AS builder
+
+WORKDIR /app
+
+# Install build dependencies
+RUN apk add --no-cache git
+
+# Copy go mod files
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o beat-harvester .
+
+# Runtime stage
+FROM alpine:latest
+
+# Install runtime dependencies
+RUN apk add --no-cache \
+    python3 \
+    py3-pip \
+    ffmpeg \
+    libwebp-tools \
+    ca-certificates \
+    tzdata
+
+# Install yt-dlp
+RUN pip3 install --no-cache-dir yt-dlp
+
+# Create app user
+RUN addgroup -g 1001 -S appgroup && \
+    adduser -u 1001 -S appuser -G appgroup
+
+# Create directories
+RUN mkdir -p /app/downloads /app/temp && \
+    chown -R appuser:appgroup /app
+
+# Copy binary from builder
+COPY --from=builder /app/beat-harvester /app/
+
+# Switch to non-root user
+USER appuser
+
+WORKDIR /app
+
+# Expose port
+EXPOSE 3000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD wget --no-verbose --tries=1 --spider http://localhost:3000/api/health || exit 1
+
+CMD ["./beat-harvester"]