Use standard Dockerfile and port

.devcontainer/Dockerfile

@@ -1,8 +1,6 @@
 ARG VARIANT=bullseye
-FROM mcr.microsoft.com/vscode/devcontainers/base:0-${VARIANT}
+FROM --platform=amd64 mcr.microsoft.com/vscode/devcontainers/base:0-${VARIANT}
 RUN export DEBIAN_FRONTEND=noninteractive \
      && apt-get update && apt-get install -y xdg-utils \
      && apt-get clean -y && rm -rf /var/lib/apt/lists/*
-RUN mkdir -p /opt/microsoft/azd \
-     && curl -L https://github.com/Azure/azure-dev/releases/download/azure-dev-cli_0.9.0-beta.2/azd-linux-arm64-beta.tar.gz | tar zxvf - -C /opt/microsoft/azd \
-     && ln -s /opt/microsoft/azd/azd-linux-arm64 /usr/local/bin/azd
+RUN curl -fsSL https://aka.ms/install-azd.sh | bash

start.sh

@@ -48,7 +48,7 @@ echo ""
 echo "Starting backend"
 echo ""
 cd ..
-python3 -m flask run --port=50555 --reload --debug
+python3 -m flask run --port=5000 --reload --debug
 if [ $? -ne 0 ]; then
     echo "Failed to start backend"
     exit $?