Fix Dockerfile: Remove unnecessary package 'software-properties-common' from Grafana installation

Dockerfile

@@ -24,7 +24,7 @@ RUN useradd -m -u 1000 user
 WORKDIR /app
 
 # Grafana
-RUN apt-get update && apt-get install -y wget apt-transport-https software-properties-common && \
+RUN apt-get update && apt-get install -y wget apt-transport-https && \
     wget -q -O /usr/share/keyrings/grafana.key https://apt.grafana.com/gpg.key && \
     echo "deb [signed-by=/usr/share/keyrings/grafana.key] https://apt.grafana.com stable main" | tee /etc/apt/sources.list.d/grafana.list && \
     apt-get update && \