fix(docker): "ENV key=value" should be used instead of legacy "ENV ke…

…y value" format

Dockerfile

@@ -17,6 +17,6 @@ RUN cd ./assets/git_repo && git config features.manyFiles 1
 RUN pip install .
 
 EXPOSE 8000
-ENV LISTEN_PORT = 8000
+ENV LISTEN_PORT=8000
 
 CMD ["uvicorn", "api.main:app", "--host=0.0.0.0", "--proxy-headers"]