Fixed frontend by adding a publicHost argument to docker-compose.yml

Description

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Fixes frontend giving out an Invalid Host Header

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[x] My code follows similar styling to existing code in this project
[x] I have performed a self-review of my own code
[ ] I have commented my code, at the very least in hard-to-understand areas
[ ] I have made corresponding changes to documentation / READMEs
[x] My changes generate no new warnings
[x] I have remade my frontend and backend Docker containers to ensure my changes do not break the setup for these
[ ] I have added tests that prove my fix is effective or that my feature works
[ ] New and existing unit tests pass locally with my changes
[x] I have checked my code and corrected any misspellings