Update Dockerfile

[almart]

Adding code to remove Evilginx3 "easter eggs" that have built-in IoC's such as adding a header of the hostname of the server within all requests. This updates the DockerFile on runtime to remove the identified code in each line.

1. Manually reviewed IoC's form public sources and other information
2. Reviewed http_proxy.go to identify the relevant lines
3. Used "sed" as was previously present to remove the lines from the code before building