bump alpine base image version from 3.19.1 to 3.20.3 (#66)

Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.22 as builder
+FROM golang:1.22 AS builder
 ARG TARGETOS
 ARG TARGETARCH
 ARG VERSION
@@ -34,7 +34,7 @@ RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build \
     -X github.com/undistro/marvin/pkg/version.commit=${COMMIT} \
     -X github.com/undistro/marvin/pkg/version.date=${DATE}" -a -o marvin main.go
 
-FROM alpine:3.19.1
+FROM alpine:3.20.3
 RUN apk upgrade && rm /var/cache/apk/*
 RUN addgroup -g 8494 -S nonroot && adduser -u 8494 -D -S nonroot -G nonroot
 USER 8494:8494