fix ot-frontend

ot-frontend/arm/Dockerfile

@@ -35,4 +35,5 @@ EXPOSE 80
 
 CMD set -xe \
     && envsubst '${SERVER_HOST}:${SERVER_PORT}' < /etc/nginx/nginx.tmpl > /etc/nginx/nginx.conf \
+    && mkdir -p /run/nginx/ \
     && nginx -g 'daemon off;'

ot-recorder/arm/docker-compose.yml

@@ -23,7 +23,6 @@ services:
     ports:
       - 8080:80
     environment:
-      - LISTEN_PORT=80
       - SERVER_HOST=recorder
       - SERVER_PORT=8083
     restart: unless-stopped