config split

ci/prod/compose/mntx_gateway.dockerfile

@@ -28,9 +28,10 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
     -o /out/mntx-gateway .
 
 FROM alpine:latest AS runtime
+ARG APP_CONFIG_PATH=api/gateway/mntx/config.yml
 RUN apk add --no-cache ca-certificates tzdata wget
 WORKDIR /app
-COPY api/gateway/mntx/config.yml /app/config.yml
+COPY ${APP_CONFIG_PATH} /app/config.yml
 COPY api/gateway/mntx/entrypoint.sh /app/entrypoint.sh
 COPY --from=build /out/mntx-gateway /app/mntx-gateway
 RUN chmod +x /app/entrypoint.sh