Simplify sgardd Dockerfile: remove baked-in user/args, defer config to orchestration.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-3.2.1
+3.2.2

deploy/docker/Dockerfile

@@ -13,18 +13,11 @@ RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /sgardd ./cmd/sgardd
 # Runtime stage
 FROM alpine:3.21
 
-RUN apk add --no-cache ca-certificates tzdata \
-    && adduser -D -h /srv/sgard sgard
+RUN apk add --no-cache ca-certificates tzdata
 
 COPY --from=builder /sgardd /usr/local/bin/sgardd
 
-VOLUME /srv/sgard
+WORKDIR /srv/sgard
 EXPOSE 9473
 
-USER sgard
-
-ENTRYPOINT ["sgardd", \
-    "--repo", "/srv/sgard", \
-    "--authorized-keys", "/srv/sgard/authorized_keys", \
-    "--tls-cert", "/srv/sgard/certs/sgard.pem", \
-    "--tls-key", "/srv/sgard/certs/sgard.key"]
+ENTRYPOINT ["sgardd"]