fix: Dockerfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- 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-1920713
- https://snyk.io/vuln/SNYK-ALPINE314-BUSYBOX-1920718

Dockerfile

@@ -12,7 +12,7 @@ RUN apk --no-cache add make git gcc libc-dev curl && make build
 # -----------------------------------------------------------------------------
 # Build the final Docker image
 
-FROM alpine:3.14.1
+FROM alpine:3.17
 ARG KUBECTL_VERSION="v1.21.2"
 
 COPY --from=build /k9s/execs/k9s /bin/k9s