Add 418 error document for dev environment

.gitignore

@@ -1,7 +1,7 @@
 dist/
 .data/
 keys/
-config.yml
+*.config.yml
 private.key.pem
 public.key.pem
 api-test-scripts/acc.json

config/azalea.config.example.yml

@@ -7,3 +7,6 @@ auth:
   public: public.key.pem
 apiDomain: api.example.com
 rateLimit: 300
+logs:
+  accessLogDir: logs
+418: '418.html'

config/azalea.config.yml

@@ -7,3 +7,4 @@ auth:
   public: /etc/melon-summer/keys/public.key.pem
 apiDomain: api.summer.test
 rateLimit: 300
+418: '/etc/melon-summer/418.html'

docker-compose.development.yml

@@ -34,6 +34,7 @@ services:
     volumes:
       - ".data/keys:/etc/melon-summer/keys"
       - "./config/azalea.config.yml:/etc/melon-summer/azalea.config.yml:ro"
+      - ".data/418.html:/etc/melon-summer/418.html:ro"
     ports:
       - "8080:80"
       - "8443:443"