⬆️ Update alpine Docker tag to v3.20 (#101)

Signed-off-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Dockerfile

@@ -25,7 +25,7 @@ RUN touch /usr/src/mochi/src/main.rs
 # This is the actual application build.
 RUN cargo build --target x86_64-unknown-linux-musl --release
 
-FROM --platform=linux/amd64 alpine:3.19@sha256:c5b1261d6d3e43071626931fc004f70149baeba2c8ec672bd4f27761f8e1ad6b
+FROM --platform=linux/amd64 alpine:3.20@sha256:1e42bbe2508154c9126d48c2b8a75420c3544343bf86fd041fb7527e017a4b4a
 
 WORKDIR /usr/local/bin