nginx-luaHow to set content type

server {
  location / {
    content_by_lua_block {
      ngx.header["Content-type"] = 'text/html'
      ngx.say('<b>i am html</b>')
    }
  }
}ctrl + cgithub

`content_by_lua_block` nginx-lua module directive to specify block of Lua code	`ngx.header` allows to set response headers
`Content-type` response header to set	`text/html` set content type to `text/html`
`ngx.say` output given text to client

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