add nginx to serve stats.json (sdr-enthusiasts#30)

Dockerfile

@@ -1,13 +1,15 @@
 FROM ghcr.io/sdr-enthusiasts/docker-baseimage:base
 
-COPY rootfs/ /
-
 # hadolint ignore=DL3008,DL3003,SC1091
 RUN set -x && \
  #
- # Install libusb
+ KEPT_PACKAGES=() && \
+ KEPT_PACKAGES+=(nginx-light) && \
+ KEPT_PACKAGES+=(libusb-1.0.0) && \
  apt-get update -y && \
- apt-get install --no-install-recommends -y libusb-1.0-0 && \
+ apt-get install --no-install-recommends -y \
+ ${KEPT_PACKAGES[@]} \
+ && \
  #
  # Download airspy_adsb arm binary
  curl \
@@ -88,6 +90,8 @@ RUN set -x && \
  apt-get -v clean && \
  rm -rfv /tmp/* /var/lib/apt/lists/*
 
+COPY rootfs/ /
+
 EXPOSE 30005
 
 HEALTHCHECK --interval=60s --timeout=60s --start-period=30s --retries=3 CMD [ "/scripts/healthcheck.sh" ]

rootfs/etc/nginx.conf

@@ -0,0 +1,34 @@
+user www-data;
+worker_processes 1;
+pid /run/nginx.pid;
+include /etc/nginx/modules-enabled/*.conf;
+daemon off;
+
+events {
+ use  epoll;
+ worker_connections 32;
+}
+
+error_log off;
+
+http {
+ server_tokens off;
+ include mime.types;
+ charset utf-8;
+
+ access_log  off;
+
+ server {
+ server_name _;
+ listen 80 default_server;
+ root /var/www/html
+
+ error_page 500 502 503 504 /50x.html;
+
+ location / {
+ alias /run/airspy_adsb;
+ }
+
+ }
+
+}

rootfs/etc/s6-overlay/s6-rc.d/nginx/run

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec /etc/s6-overlay/scripts/nginx

rootfs/etc/s6-overlay/s6-rc.d/nginx/type

@@ -0,0 +1 @@
+longrun

rootfs/etc/s6-overlay/scripts/airspy_adsb

@@ -113,6 +113,7 @@ fi
 
 # Handle "-S"
 if chk_enabled "${AIRSPY_ADSB_STATS}"; then
+ mkdir -p /run/airspy_adsb
  AIRSPY_ADSB_CMD+=("-S" "/run/airspy_adsb/stats.json")
 fi
 

rootfs/etc/s6-overlay/scripts/nginx

@@ -0,0 +1,10 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash disable=SC1091
+
+source /scripts/common
+
+if ! chk_enabled "${AIRSPY_ADSB_STATS}"; then
+ exec sleep infinity
+fi
+
+exec s6wrap --quiet --prepend=nginx --timestamps --args /usr/sbin/nginx