rm alpine_image default arg

Author: chaptersix

.github/docker/targets/server.Dockerfile

@@ -1,4 +1,4 @@
-ARG ALPINE_IMAGE=alpine:3.22@sha256:4b7ce07002c69e8f3d704a9c5d6fd3053be500b7f1c69fc0d80990c2ad8dd412
+ARG ALPINE_IMAGE
 
 FROM ${ALPINE_IMAGE}
 
@@ -7,7 +7,7 @@ ARG TARGETARCH
 RUN apk add --no-cache \
     ca-certificates \
     tzdata && addgroup -g 1000 temporal && \
-    adduser -u 1000 -G temporal -D temporal 
+    adduser -u 1000 -G temporal -D temporal
 
 COPY --chmod=755 ./build/${TARGETARCH}/temporal-server /usr/local/bin/