adding docker healthcheck and an unauthenticated port for external healthchecks

Dockerfile

@@ -8,6 +8,8 @@ WORKDIR /opt
 
 RUN apk add --no-cache gettext
 
-COPY auth.conf auth.htpasswd launch.sh ./
+COPY auth.conf healthcheck.conf auth.htpasswd launch.sh ./
+
+HEALTHCHECK CMD wget -q http://localhost:80/ || exit 1
 
 CMD ["./launch.sh"]

auth.conf

@@ -1,11 +1,14 @@
 server {
- listen 80 default_server;
+  listen 80 default_server;
 
- location / {
-     auth_basic              "Restricted";
-     auth_basic_user_file    auth.htpasswd;
+  location / {
+    satisfy  any;
+    allow 127.0.0.1;
+    deny   all;
+    auth_basic              "Restricted";
+    auth_basic_user_file    auth.htpasswd;
 
-     proxy_pass                          http://${FORWARD_HOST}:${FORWARD_PORT};
-     proxy_read_timeout                  900;
- }
+    proxy_pass                          http://${FORWARD_HOST}:${FORWARD_PORT};
+    proxy_read_timeout                  900;
+  }
 }

healthcheck.conf

@@ -0,0 +1,8 @@
+server {
+  listen 9999 default_server;
+
+  location / {
+    proxy_pass                          http://${FORWARD_HOST}:${FORWARD_PORT};
+    proxy_read_timeout                  900;
+  }
+}

launch.sh

@@ -2,6 +2,7 @@
 
 rm /etc/nginx/conf.d/default.conf || :
 envsubst < auth.conf > /etc/nginx/conf.d/auth.conf
+envsubst < healthcheck.conf > /etc/nginx/conf.d/healthcheck.conf
 envsubst < auth.htpasswd > /etc/nginx/auth.htpasswd
 
 nginx -g "daemon off;"