fix: Docker networking issues

Dockerfile

@@ -1,9 +1,11 @@
 FROM ubuntu
+EXPOSE 8000
+WORKDIR /app
 RUN apt update
 RUN apt install -y git python3 python3-pip
-RUN cd ~ && git clone https://github.com/paulbricman/conceptarium
 RUN apt install -y libsasl2-dev python-dev libldap2-dev libssl-dev
-RUN python3 -m pip install pyOpenSSL uvicorn[standard]
-RUN cd ~/conceptarium && python3 -m pip install -r requirements.txt
-CMD cd ~/conceptarium; python3 -m uvicorn --host 0.0.0.0 main:app
-EXPOSE 8000
+COPY requirements.txt ./requirements.txt
+RUN pip3 install pyOpenSSL uvicorn[standard]
+RUN pip3 install -r requirements.txt
+COPY . .
+CMD python3 -m uvicorn --host 0.0.0.0 main:app