Update Dockerfile

Dockerfile

@@ -1,5 +1,13 @@
-# Stage 1: Build the Mirror server (assuming the Unity server build is already done)
-FROM ubuntu:20.04 AS builder
+FROM ubuntu:20.04
+
+# Set the timezone environment variable (example: America/New_York)
+ENV TZ=America/New_York
+
+# Install tzdata package and set timezone non-interactively
+RUN apt-get update && apt-get install -y tzdata \
+    && ln -snf /usr/share/zoneinfo/$TZ /etc/localtime \
+    && echo $TZ > /etc/timezone \
+    && apt-get clean
 
 # Install dependencies
 RUN apt-get update && apt-get install -y \