fix Dockerfile build after deprecation of apt-key

Author: bojeanson

edge_orchestrator/Dockerfile

@@ -7,7 +7,8 @@ ARG BUILDOS
 RUN if [ "$TARGETPLATFORM" = "linux/arm64" ] && [ "$BUILDOS" = "linux" ]; then \
         apt update && apt install -y --no-install-recommends gnupg; \
         echo "deb http://archive.raspberrypi.org/debian/ bookworm main" > /etc/apt/sources.list.d/raspi.list \
-        && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 82B129927FA3303E; \
+        && gpg --keyserver keyserver.ubuntu.com --recv-keys 82B129927FA3303E \
+        && gpg --export 82B129927FA3303E | tee /etc/apt/trusted.gpg.d/raspberry.gpg > /dev/null; \
     fi
 
 RUN if [ "$TARGETPLATFORM" = "linux/arm64" ] && [ "$BUILDOS" = "linux" ]; then \

edge_orchestrator/tests/helpers/tf_serving_container.py

@@ -1,3 +1,4 @@
+import time
 from typing import Dict
 
 from testcontainers.core.container import DockerContainer
@@ -28,4 +29,5 @@ def _connect(self, default_starting_log: str):
     def start(self, starting_log: str = r"Uvicorn running on"):
         super().start()
         self._connect(starting_log)
+        time.sleep(2)  # wait for the container to be fully started
         return self