添加各个节点的镜像制作

examples/master/Dockerfile

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+FROM alpine:latest
+
+# 配置工作目录
+WORKDIR /opt/crawlab
+
+# 拷贝配置文件
+COPY config.yml /opt/crawlab/conf/config.yml
+
+# 拷贝可执行文件
+COPY crawlab /usr/local/bin
+
+# 创建spiders文件用于存放爬虫， 授权可执行文件
+RUN mkdir -p /opt/crawlab/spiders && chmod +x /usr/local/bin/crawlab
+
+# 指定为Master节点
+ENV CRAWLAB_SERVER_MASTER Y
+
+EXPOSE 8000
+
+CMD ["crawlab"]

examples/master/README.md

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+# Master 节点镜像制作
+
+在Dockerfile里面的二进制包，需要手动在源码目录下进行构建然后再放进来。
+
+## Linux 二进制包构建
+```
+CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o crawlab main.go
+```

examples/master/config.yml

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+api:
+  address: "localhost:8000"
+mongo:
+  host: "192.168.235.26"
+  port: 27017
+  db: crawlab_local
+  username: "root"
+  password: "example"
+  authSource: "admin"
+redis:
+  address: 192.168.235.0
+  password: redis-1.0
+  database: 29
+  port: 16379
+log:
+  level: info
+  path: "/logs/crawlab"
+server:
+  host: 0.0.0.0
+  port: 8000
+  master: "Y"
+  secret: "crawlab"
+  register:
+    # mac 或者 ip，如果是ip，则需要手动指定IP
+    type: "mac"
+    ip: "192.168.0.104"
+spider:
+  path: "/spiders"
+task:
+  workers: 4
+other:
+  tmppath: "/tmp"