Fix dockerfile build error by updating to proper multi-stage build

- Replace broken wget download approach with proper Go build process
- Use multi-stage build pattern matching main Dockerfile
- Fix incorrect URL reference that was causing 404 errors in CI/CD
- Ensure consistent build process across both dockerfile variants

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Chad Shaw

dockerfile

@@ -1,16 +1,55 @@
+# Build stage
+FROM golang:1.23.4-alpine AS builder
+
+WORKDIR /build
+
+# 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 -a -installsuffix cgo -o ignite .
+
+# Production stage
 FROM alpine:latest
-ENV DB_PATH=./
+
+# Install runtime dependencies
+RUN apk --no-cache add ca-certificates curl && \
+    addgroup -g 1001 ignite && \
+    adduser -D -s /bin/sh -u 1001 -G ignite ignite
+
+# Set environment variables
+ENV DB_PATH=/app/data/
 ENV DB_FILE=ignite.db
 ENV DB_BUCKET=dhcp
 ENV BIOS_FILE=boot-bios/pxelinux.0
 ENV EFI_FILE=boot-efi/syslinux.efi
-ENV TFTP_DIR=./public/tftp
-ENV HTTP_DIR=./public/http
+ENV TFTP_DIR=/app/public/tftp
+ENV HTTP_DIR=/app/public/http
 ENV HTTP_PORT=8080
-ENV PROV_DIR=./public/provision
+ENV PROV_DIR=/app/public/provision
+
 WORKDIR /app
-RUN wget -O ./app https://github.com/chadleeshaw/ignite/releases/download/v2.0/app && \
-    chmod +x ./app
-COPY ./public /app/public
+
+# Copy binary from builder stage
+COPY --from=builder /build/ignite .
+COPY --chown=ignite:ignite ./public ./public
+
+# Create data directory for database
+RUN mkdir -p /app/data && chown ignite:ignite /app/data
+
+# Switch to non-root user
+USER ignite
+
 EXPOSE 8080
-CMD ["./ignite"]
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:8080/status || exit 1
+
+CMD ["./ignite"]