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 \

docker/client-config.patch

@@ -0,0 +1,18 @@
+--- a/src/external_plugins/client-config.py
++++ b/src/external_plugins/client-config.py
+@@ -17,0 +18,6 @@
++def normalize_client_config(config):
++    if not config["api_host"].startswith(("http://", "https://")):
++        config["api_host"] = f"https://{config['api_host']}"
++    return config
++
++
+@@ -24 +30 @@
+-        return json.loads(config)
++        return normalize_client_config(json.loads(config))
+@@ -37 +43 @@
+-    config = json.loads(t[0][0])
++    config = normalize_client_config(json.loads(t[0][0]))
+@@ -298 +304 @@
+-            "api_host": config["domain"],
++            "api_host": f"https://{config['domain']}",