diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..4cff333
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,6 @@
+# Copy to .env and fill values
+MONGO_URI=mongodb://mongo:27017/chatdb
+JWT_SECRET=change_this_to_a_random_secret
+PORT=4000
+OPENAI_API_KEY=
+OTHER_PROVIDER_KEY=
diff --git a/deploy/docker-compose.yml b/deploy/docker-compose.yml
index 32b46ba..09a7f23 100644
--- a/deploy/docker-compose.yml
+++ b/deploy/docker-compose.yml
@@ -7,8 +7,12 @@ services:
     ports:
       - "4000:4000"
     restart: always
+    env_file:
+      - ../.env
     environment:
       - NODE_ENV=production
+    depends_on:
+      - mongo
 
   frontend:
     build:
@@ -19,3 +23,14 @@ services:
     restart: always
     depends_on:
       - backend
+
+  mongo:
+    image: mongo:6
+    restart: unless-stopped
+    volumes:
+      - mongo-data:/data/db
+    ports:
+      - "27017:27017"
+
+volumes:
+  mongo-data: