fix(build): build the loki/alloy/comfyui images in docker format

The healthcheck added to the loki image was discarded by the build:
'HEALTHCHECK is not supported for OCI image format and will be ignored'.
podman builds OCI by default, and OCI has no HEALTHCHECK field, so the
container came back with no health at all — worse than the failing check it
replaced, because nothing reports the loss.

The build now passes --format docker, and the seam pins it so a future edit
cannot quietly reintroduce an image with no health field.

scripts/deploy-remote.sh

@@ -456,7 +456,12 @@ build_compose_image() {
     cfhash="$(sha256sum "$containerfile" | cut -d' ' -f1)"
     oldhash="$(podman image inspect "$image" --format '{{index .Config.Labels "cfhash"}}' 2>/dev/null || echo none)"
     if [[ "$oldhash" != "$cfhash" ]]; then
-        podman build --no-cache --label "cfhash=$cfhash" -t "$image" -f "$containerfile" .
+        # --format docker is required, not cosmetic: podman defaults to the OCI
+        # image format, which has no HEALTHCHECK field at all, so a build in
+        # the default format silently drops the loki image's healthcheck and
+        # the container then reports no health instead of failing loudly.
+        podman build --format docker --no-cache --label "cfhash=$cfhash" \
+            -t "$image" -f "$containerfile" .
     fi
 }