201732120118-ljx improvements

[421281726]

What kind of change does this PR introduce?

Improvements：

1. Generate a requirements.txt so that others could install necessary pip packages by one command:
   pip install -r requirements.txt

2. The following JS file is not accessible but is still there, which will cause the page to load for a long time. I have comment it out.Or you can use correct site and move all js before like 3. .
   <script src="https://use.fontawesome.com/releases/v5.0.8/js/all.js"></script>

3. Scripts can block downloads of other resources, so it is recommended to place all tags as far as possible
   at the bottom before the tag to minimize the impact on the overall page download.
   Now the page loads really fast.Without any waiting even with proxy!（slow for 2. and 3. before）

4. Record IP addresses
   As it has recorded all IP address and could be banned, the administrator should have a page to see it and ban invalid IP address.
   I add an table to control if banned invalid visitor's ip in admin.html.

5. In the /templates/domain.html
   body style="background-color:#dadada;"> " missing a '<' " , syntax error.

6. Format the file service.py
   Make code more readable.

Does this PR introduce a breaking change?

No, just some simple change but good behavior

Other information:

assign: @hema-001 @spm2020spring

[421281726]

demo

Click the site to see effect! @hema-001 @spm2020spring
Now：
https://file-1300774580.cos.ap-nanjing.myqcloud.com/now.gif

Origin：
https://file-1300774580.cos.ap-nanjing.myqcloud.com/origin.gif