Refactor project structure and enhance logging

Dockerfile

@@ -1,32 +1,25 @@
-FROM golang:alpine AS builder
+FROM golang:1.24-alpine AS builder
 WORKDIR /build
 COPY go.mod go.sum ./
 RUN go mod download
 COPY . .
 RUN go build -ldflags="-s -w" -o ipinfo .
 RUN go build -ldflags="-s -w" -o healthcheck ./healthcheck/healthcheck.go
-RUN go install github.com/maxmind/geoipupdate/v7/cmd/geoipupdate@latest
 
 FROM alpine:latest
-RUN apk add --no-cache curl tzdata busybox-suid
+RUN apk add --no-cache tzdata
+
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
 
 WORKDIR /app
 COPY --from=builder /build/ipinfo .
 COPY --from=builder /build/healthcheck .
-COPY --from=builder /go/bin/geoipupdate /usr/local/bin/geoipupdate
 
-ENV GEOIPUPDATE_ACCOUNT_ID=${GEOIPUPDATE_ACCOUNT_ID}
-ENV GEOIPUPDATE_LICENSE_KEY=${GEOIPUPDATE_LICENSE_KEY}
+RUN chown -R appuser:appgroup /app
+
+USER appuser
+
 ENV GEOIPUPDATE_EDITION_IDS="GeoLite2-City GeoLite2-ASN"
-ENV GEOIPUPDATE_DB_DIR=/app
-
-RUN echo "AccountID ${GEOIPUPDATE_ACCOUNT_ID}" > /etc/GeoIP.conf && \
-    echo "LicenseKey ${GEOIPUPDATE_LICENSE_KEY}" >> /etc/GeoIP.conf && \
-    echo "EditionIDs ${GEOIPUPDATE_EDITION_IDS}" >> /etc/GeoIP.conf && \
-    echo "DatabaseDirectory ${GEOIPUPDATE_DB_DIR}" >> /etc/GeoIP.conf
-
-RUN echo "0 0 * * * geoipupdate >> /var/log/geoipupdate.log 2>&1" > /etc/crontabs/root
-RUN cat /etc/crontabs/root
 
 HEALTHCHECK --interval=30s --timeout=5s --start-period=5s CMD ["./healthcheck"]