Hey there and Happy Monday!

This doesn't seem like a Railway-specific error. Here's a couple of things you could try to debug the issue:
1) Have you tried running the app locally, and then in a container, and seeing if you are able to access those endpoints?

2) Re-trace your steps back and see what changed about the / endpoint that you were able to see it but now you don't. I'd then advise checking what the different between the / endpoint (which was then accessible) and the endpoint you were trying to access before was to spot what might be missing
3) Check out any of our Python templates for inspiration and seeing what you could be missing:
https://railway.app/templates?q=python

I did it so long ago that I don't remember what changes I had made. I'll do what you said in #1, but wanted to ask if you see anything wrong in my Dockerfile. Just want to make sure I'm not doing anything dumb.

FROM python:3.10.2-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV GOOGLE_APPLICATION_CREDENTIALS="/app/service_key.json"

RUN apt-get update && apt-get install -y \
    libgl1-mesa-glx \
    libglib2.0-0 \
    poppler-utils \
    tesseract-ocr \
    && rm -rf /var/lib/apt/lists/* 

WORKDIR /app

COPY requirements.txt /app/
RUN pip install --no-cache-dir -r requirements.txt
RUN pip install python-multipart

COPY service_key.json /app/
COPY / /app/

CMD ["sh", "-c", "uvicorn app:app --host 0.0.0.0 --port $PORT"]

If you happen to have it in your git history, that might help? The Dockerfile looks good to me. You can check out our FastAPI basic starter template (https://docs.railway.app/guides/fastapi#use-a-dockerfile) and see if you might be missing something (code: https://github.com/railwayapp-templates/fastapi/blob/main/README.md)

i figured it out, now the issue is that when i open my frontend link it says application failed to respond. i went through the railway guide for this and how they made sure you listen to the port but it still has an issue, so I'm not sure what to do from there.

I see a bunch of Method Not Allowed's in your deploy logs — have you tried debugging from there?
I'd recommend going step by step to get this up and running, you can do this! Refer to the build and deploy logs, Google and looking into the errors you run into (Stackoverflow is usually a great resource) and go from there!

It could also help to make sure all this is working locally and on Docker locally, so you can rule out some of other obvious non-Railway specific issues.