fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-ALPINE314-APKTOOLS-1533752
- https://snyk.io/vuln/SNYK-ALPINE314-OPENSSL-1569445
- https://snyk.io/vuln/SNYK-ALPINE314-OPENSSL-1569445
- https://snyk.io/vuln/SNYK-ALPINE314-ZLIB-2976174
- https://snyk.io/vuln/SNYK-ALPINE314-BUSYBOX-1920733

Dockerfile

@@ -13,7 +13,7 @@ RUN apk --no-cache add make git gcc libc-dev curl ca-certificates && make build
 
 # -----------------------------------------------------------------------------
 # Image...
-FROM alpine:3.14.0
+FROM alpine:3.19.4
 
 COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 COPY --from=build /popeye/execs/popeye /bin/popeye