Update alpine Docker tag to v3.20

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.18@sha256:02bb6f428431fbc2809c5d1b41eab5a68350194fb508869a33cb1af4444c9b11
+FROM alpine:3.20@sha256:e72ad0747b9dc266fca31fb004580d316b6ae5b0fdbbb65f17bbe371a5b24cff
 
 RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
 RUN apk add --update --no-cache \