Update Dockerfile

Dockerfile

@@ -8,6 +8,9 @@ RUN apt-get update && apt-get install -y git curl && rm -rf /var/lib/apt/lists/*
 # Declare build arg
 ARG GITHUB_TOKEN
 
+# Optionally set it as env (if other commands need it)
+ENV GITHUB_TOKEN=$GITHUB_TOKEN
+
 # Upgrade pip
 RUN pip install --upgrade pip