remove build dir

Author: sjnam

build/Dockerfile renamed to Dockerfile

@@ -42,7 +42,7 @@ Run
 ---
 ```bash
 % git clone https://github.com/sjnam/mpresty.git
-% cd mpresty/build
+% cd mpresty
 % docker-compose build
 % docker-compose up -d
 ```

README.md

@@ -7,9 +7,9 @@ services:
     build:
       context: .
     volumes:
-      - ../webapp/lua:/usr/local/openresty/nginx/lua
-      - ../webapp/html:/usr/local/openresty/nginx/html
-      - ../webapp/conf.d:/etc/nginx/conf.d
+      - ./webapp/lua:/usr/local/openresty/nginx/lua
+      - ./webapp/html:/usr/local/openresty/nginx/html
+      - ./webapp/conf.d:/etc/nginx/conf.d
     ports:
       - "8080:8080"