Update app.sh

app.sh

@@ -1,5 +1,25 @@
 #!/bin/sh
 
+# Conditional installations based on STORAGE_TYPE
+case "${STORAGE_TYPE}" in
+  "redis")
+    echo "Installing Redis..."
+    npm install redis
+    ;;
+  "postgres")
+    echo "Installing PostgreSQL..."
+    npm install pg
+    ;;
+  "memcached")
+    echo "Installing Memcached..."
+    npm install memcached
+    ;;
+  "rethinkdb")
+    echo "Installing RethinkDB..."
+    npm install rethinkdbdash
+    ;;
+esac
+
 # If TEST_MODE is true, install Mocha and run tests
 if [ "$TEST_MODE" = "true" ]; then
   echo "Installing Mocha for testing..."