ci: add all platforms to release and docker workflows

Author: m0wer

.github/workflows/docker.yaml

@@ -77,4 +77,4 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6

.github/workflows/release.yaml

@@ -79,9 +79,20 @@ jobs:
           - goos: linux
             goarch: amd64
             output: neutrinod-linux-amd64
+          - goos: linux
+            goarch: 386
+            output: neutrinod-linux-386
           - goos: linux
             goarch: arm64
             output: neutrinod-linux-arm64
+          - goos: linux
+            goarch: arm
+            goarm: 7
+            output: neutrinod-linux-armv7
+          - goos: linux
+            goarch: arm
+            goarm: 6
+            output: neutrinod-linux-armv6
           - goos: darwin
             goarch: amd64
             output: neutrinod-darwin-amd64
@@ -91,6 +102,9 @@ jobs:
           - goos: windows
             goarch: amd64
             output: neutrinod-windows-amd64.exe
+          - goos: windows
+            goarch: arm64
+            output: neutrinod-windows-arm64.exe
 
     steps:
       - name: Checkout
@@ -115,6 +129,7 @@ jobs:
         env:
           GOOS: ${{ matrix.goos }}
           GOARCH: ${{ matrix.goarch }}
+          GOARM: ${{ matrix.goarm }}
           CGO_ENABLED: 0
           SOURCE_DATE_EPOCH: ${{ steps.source_date.outputs.epoch }}
         run: |
@@ -174,7 +189,7 @@ jobs:
         with:
           context: ./neutrino_server
           file: ./neutrino_server/Dockerfile
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

CHANGELOG.md

@@ -7,6 +7,24 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add a production-ready `systemd` service example in README for running the
+  `neutrinod` binary directly on Linux hosts (including Raspberry Pi), with a
+  signet-oriented configuration example.
+
+### Changed
+
+- Docker image publishing now includes `linux/386`, `linux/arm/v7`, and
+  `linux/arm/v6` in addition to `linux/amd64` and `linux/arm64`, expanding
+  compatibility to 32-bit x86 and broader 32-bit ARM Linux systems.
+- Release binary matrix now includes `linux-386`, `linux-armv7`,
+  `linux-armv6`, and `windows-arm64` artifacts in addition to the previous
+  `linux-amd64`, `linux-arm64`, `darwin-amd64`, `darwin-arm64`, and
+  `windows-amd64` outputs.
+- README now documents a signet Docker run example using
+  `LISTEN_ADDR=0.0.0.0:38334` and host port mapping `38334:38334`.
+
 ## [1.2.0] - 2026-04-30
 
 ### Fixed

README.md

@@ -8,7 +8,7 @@ A standalone REST API server for [Neutrino](https://github.com/lightninglabs/neu
 - **Lightweight**: No need to download full blockchain, only block headers and compact filters
 - **REST API**: Simple HTTP endpoints for blockchain queries, transaction broadcasting, and UTXO scanning
 - **Multi-Network**: Support for mainnet, testnet, regtest, and signet
-- **Docker Support**: Easy deployment with Docker and docker-compose
+- **Docker Support**: Easy deployment with Docker and docker-compose (linux/amd64, linux/386, linux/arm64, linux/arm/v7, linux/arm/v6)
 - **Production Ready**: Includes health checks, graceful shutdown, and comprehensive logging
 
 ## Quick Start
@@ -47,6 +47,16 @@ docker run -d \
   -e LOG_LEVEL=debug \
   -e NO_AUTH=true \
   ghcr.io/m0wer/neutrino-api:1
+
+# Run for signet (using conventional signet API port 38334)
+docker run -d \
+  -p 38334:38334 \
+  -v neutrino-signet-data:/data/neutrino \
+  -e NETWORK=signet \
+  -e LISTEN_ADDR=0.0.0.0:38334 \
+  -e LOG_LEVEL=info \
+  -e ADD_PEERS=bitcoin.sgn.space:38333 \
+  ghcr.io/m0wer/neutrino-api:1
 ```
 
 ### Building from Source
@@ -92,7 +102,7 @@ Anyone can reproduce and verify a release locally with one command:
 | Variable | Default | Description |
 |----------|---------|-------------|
 | `NETWORK` | `mainnet` | Bitcoin network (mainnet, testnet, regtest, signet) |
-| `LISTEN_ADDR` | `0.0.0.0:8334` | REST API listen address |
+| `LISTEN_ADDR` | `0.0.0.0:8334` | REST API listen address (for signet, `0.0.0.0:38334` is a common convention) |
 | `DATA_DIR` | `/data/neutrino` | Data directory for headers and filters |
 | `LOG_LEVEL` | `info` | Log level (trace, debug, info, warn, error) |
 | `ADD_PEERS` | | Comma-separated list of preferred peers (e.g., `node1:8333,node2:8333`) while still allowing peer discovery |
@@ -452,6 +462,47 @@ volumes:
   neutrino-data:
 ```
 
+### systemd Service Example (binary install)
+
+If you run the standalone binary directly on a host (including Raspberry Pi),
+this unit file starts `neutrinod` at boot and restarts it on failures:
+
+```ini
+# /etc/systemd/system/neutrinod.service
+[Unit]
+Description=Neutrino API daemon
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=neutrino
+Group=neutrino
+Environment=NETWORK=signet
+Environment=LISTEN_ADDR=0.0.0.0:38334
+Environment=DATA_DIR=/var/lib/neutrinod
+Environment=LOG_LEVEL=info
+Environment=ADD_PEERS=bitcoin.sgn.space:38333
+ExecStart=/usr/local/bin/neutrinod --network=${NETWORK} --listen=${LISTEN_ADDR} --datadir=${DATA_DIR} --loglevel=${LOG_LEVEL} --addpeer=${ADD_PEERS}
+Restart=always
+RestartSec=5
+NoNewPrivileges=true
+ProtectSystem=full
+ProtectHome=true
+ReadWritePaths=/var/lib/neutrinod
+
+[Install]
+WantedBy=multi-user.target
+```
+
+```bash
+sudo useradd --system --home /var/lib/neutrinod --shell /usr/sbin/nologin neutrino
+sudo mkdir -p /var/lib/neutrinod
+sudo chown -R neutrino:neutrino /var/lib/neutrinod
+sudo systemctl daemon-reload
+sudo systemctl enable --now neutrinod
+```
+
 **Note:** TLS and API token authentication are enabled by default. After first start, find the auth token in the data volume at `auth_token` and the TLS certificate at `tls.cert`. Clients must use HTTPS and include `Authorization: Bearer <token>`.
 
 ### Security Considerations

RELEASE.md

@@ -57,13 +57,16 @@ git push origin v1.0.0
 The GitHub Actions workflow will automatically:
 
 1. **Build Binaries** for:
-   - Linux (amd64, arm64)
+   - Linux (amd64, 386, arm64, armv7, armv6)
    - macOS (amd64, arm64)
-   - Windows (amd64)
+   - Windows (amd64, arm64)
 
 2. **Build Docker Images** for:
    - linux/amd64
+   - linux/386
    - linux/arm64
+   - linux/arm/v7
+   - linux/arm/v6
 
 3. **Create GitHub Release** with:
    - All binaries