made network configurable

.env

@@ -0,0 +1,3 @@
+WEBHOOK_SECRET=1234
+NGINX_NETWORK=network-name
+WEBHOOK_GIT_NETWORK=network-name

docker-compose.yml

@@ -7,6 +7,8 @@ services:
       - static-files:/usr/share/nginx/html
       - webhooks-git-ssh:/root/.ssh
       - webhooks-git-data:/etc/webhook/
+    networks:
+      - nginx-network
 
   webhooks-git:
     build:
@@ -14,9 +16,18 @@ services:
       dockerfile: Dockerfile
     volumes:
       - static-files:/etc/static-files
+    networks:
+      - webhooks-git-network
 
 volumes:
   static-files:
   webhooks-git-ssh:
   webhooks-git-data:
+network:
+  nginx-network:
+    name: ${NGINX_NETWORK}
+    external: true
+  webhooks-git-network:
+    name: ${WEBHOOKS_GIT_NETWORK}
+    external: true