Coolify CI/CD testing

Dockerfile.agent

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+# Dockerfile for Nerd Monitor Agent
+# Multi-stage build optimized for minimal size
+
+FROM golang:1.23-alpine AS builder
+
+WORKDIR /app
+
+# Install build dependencies
+RUN apk add --no-cache git make
+
+# Copy go mod files
+COPY go.mod go.sum ./
+
+# Download dependencies
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build the agent
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o bin/nerd-monitor-agent ./cmd/agent
+
+# Runtime stage
+FROM alpine:latest
+
+WORKDIR /app
+
+# Install runtime dependencies (minimal)
+RUN apk add --no-cache ca-certificates tzdata
+
+# Copy binary from builder
+COPY --from=builder /app/bin/nerd-monitor-agent /app/nerd-monitor-agent
+
+# Create non-root user for security
+RUN addgroup -g 1000 nerdmonitor && adduser -D -u 1000 -G nerdmonitor nerdmonitor
+
+# Change ownership
+RUN chown -R nerdmonitor:nerdmonitor /app
+
+# Switch to non-root user
+USER nerdmonitor
+
+# Default environment variables
+ENV SERVER=localhost:8080
+ENV INTERVAL=15s
+
+# Run the agent
+ENTRYPOINT ["/app/nerd-monitor-agent"]
+CMD ["--server", "${SERVER}", "--interval", "${INTERVAL}"]