Normalize frontend API host URLs

Dockerfile

@@ -11,6 +11,7 @@ RUN apt-get update \
         g++ \
         libmariadb-dev \
         make \
+        patch \
         patchelf \
         python3-dev \
     && rm -rf /var/lib/apt/lists/*
@@ -18,6 +19,9 @@ RUN apt-get update \
 COPY upstream/HubBackend/requirements.txt upstream/HubBackend/makefile ./
 COPY upstream/HubBackend/src ./src
 COPY upstream/HubBackend/config_sample.json upstream/HubBackend/openapi.json ./
+COPY docker/client-config.patch ./docker/client-config.patch
+
+RUN patch -p1 < docker/client-config.patch
 
 # Compile the binaries from the backend source code. Cache the build data.
 RUN --mount=type=cache,target=/root/.cache/pip \