Updated compose to build the docker image when required. Added env customisation options. Added update script

update.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+set -e
+
+source .env
+
+echo "[i] Updating your moonlight instance"
+
+echo "[i] Checking for updates on deploy repo"
+
+# Fetch remote updates
+git fetch
+
+# Get current branch name
+branch=$(git rev-parse --abbrev-ref HEAD)
+
+# Compare local and remote branch
+local_commit=$(git rev-parse "$branch")
+remote_commit=$(git rev-parse "origin/$branch")
+
+if [ "$local_commit" != "$remote_commit" ]; then
+    echo "[i] The deploy repository has updates. Fetching changes"
+    git pull
+    echo "[i] Updated deploy tools. Please rerun the update.sh"
+    exit 0
+else
+    echo "[i] No update of the deploy repository available"
+fi
+
+if [ "$MOONLIGHT_BUILD" == "build" ]; then
+    echo "[i] Rebuilding the docker image"
+    docker compose build
+    echo "[i] Rebuild done"
+fi
+
+if [ "$MOONLIGHT_BUILD" == "pull" ]; then
+    echo "[i] Pulling the latest docker image"
+    docker compose build
+    echo "[i] Pulling completed"
+fi
+
+echo "[i] Stopping containers"
+docker compose down
+
+echo "[i] Starting containers"
+docker compose up -d
+
+echo "[i] Update done :>"