Upgrade Docker base image to Alpine 3.22

Signed-off-by: giuaig <[email protected]>

Author: giuaig

Dockerfile

@@ -7,7 +7,7 @@ WORKDIR /src/mysql-backup
 RUN mkdir /out && go build -o /out/mysql-backup .
 
 # we would do from scratch, but we need basic utilities in order to support pre/post scripts
-FROM alpine:3.20 AS runtime
+FROM alpine:3.22 AS runtime
 LABEL org.opencontainers.image.authors="https://github.com/databacker"
 
 # set us up to run as non-root user