Expose 9092 port on docker container (#517)

If this commit merged focalboard helm chart would be able to implement a metrics endpoint.

docker/Dockerfile

@@ -19,7 +19,7 @@ FROM alpine:latest
 ARG PUID=2000
 ARG PGID=2000
 
-EXPOSE 8000/tcp
+EXPOSE 8000/tcp 9092/tcp
 
 VOLUME /data
 

docker/docker-compose-db-nginx.yml

@@ -6,14 +6,14 @@ services:
     container_name: focalboard
     depends_on:
       - focalboard-db
-    expose: 
+    expose:
       - 8000
     environment:
       - VIRTUAL_HOST=focalboard.local
       - VIRTUAL_PORT=8000
     volumes:
       - "./config.json:/opt/focalboard/config.json"
-  
+
   proxy:
     image: jwilder/nginx-proxy:latest
     container_name: focalboard-proxy

docker/docker-compose.yml

@@ -4,7 +4,7 @@ services:
     build:
       context: ./
     container_name: focalboard
-    ports: 
+    ports:
       - 80:8000
     environment:
       - VIRTUAL_HOST=focalboard.local