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Dockerfile

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+# Build Stage
+FROM golang:1.21-alpine AS build
+
+# Install necessary packages including CA certificates
+RUN apk --no-cache add ca-certificates tzdata git curl
+
+WORKDIR /src
+
+# Copy go mod files first for better caching
+COPY go.mod go.sum ./
+
+# Download dependencies
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o /app cmd/server/main.go
+
+# Development Stage
+FROM golang:1.21-alpine AS development
+
+# Install air for live reload and other dev tools
+RUN go install github.com/cosmtrek/air@latest
+
+# Install necessary packages
+RUN apk --no-cache add ca-certificates tzdata git curl
+
+WORKDIR /app
+
+# Copy go mod files
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Set timezone
+ENV TZ=Asia/Jakarta
+
+# Expose port
+EXPOSE 3300
+
+# Use air for live reload in development
+CMD ["air", "-c", ".air.toml"]
+
+# Migration Stage
+FROM build AS migration
+
+# Install migration tool
+RUN go install -tags 'postgres' github.com/golang-migrate/migrate/v4/cmd/migrate@latest
+
+WORKDIR /app
+
+# Copy migration files
+COPY migrations ./migrations
+COPY infra ./infra
+
+# Set the entrypoint for migrations
+ENTRYPOINT ["migrate"]
+
+# Production Stage
+FROM debian:bullseye-slim AS production
+
+# Install minimal runtime dependencies + Chrome, Chromium, and wkhtmltopdf for PDF generation
+RUN apt-get update && apt-get install -y \
+    ca-certificates \
+    tzdata \
+    curl \
+    fontconfig \
+    wget \
+    gnupg \
+    && wget -q -O - https://dl.google.com/linux/linux_signing_key.pub | apt-key add - \
+    && echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list \
+    && apt-get update \
+    && apt-get install -y google-chrome-stable chromium wkhtmltopdf \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user for security
+RUN groupadd -r appuser && useradd -r -g appuser appuser
+
+# Copy the binary
+COPY --from=build /app /app
+
+# Copy configuration files
+COPY --from=build /src/infra /infra
+
+# Change ownership to non-root user
+RUN chown -R appuser:appuser /app /infra
+
+# Set timezone
+ENV TZ=Asia/Jakarta
+
+# Expose port
+EXPOSE 3300
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
+  CMD curl -f http://localhost:3300/health || exit 1
+
+# Switch to non-root user
+USER appuser
+
+# Set the entrypoint
+ENTRYPOINT ["/app"]