Improve password security by using environment variables with fallback to default password

Update files

Update start_server.sh

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Update packages.txt

Update packages.txt

Update on_startup.sh

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Update on_startup.sh

Update on_startup.sh

Update on_startup.sh

Update on_startup.sh

Update on_startup.sh

Delete login.html

Update Dockerfile

Update start_server.sh

Update start_server.sh

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initial commit