fix: server/Dockerfile to reduce vulnerabilities (#35)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE323-ZLIB-15435529

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

Author: dpatsora

server/Dockerfile

@@ -16,7 +16,7 @@ COPY . .
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o faucet-server main.go
 
 # Production stage
-FROM alpine:3.23.3
+FROM alpine:3.23.4
 
 # Install ca-certificates for HTTPS requests
 RUN apk --no-cache add ca-certificates