diff --git a/eg3/README.md b/eg3/README.md
index 743068d..bc4ed8f 100644
--- a/eg3/README.md
+++ b/eg3/README.md
@@ -2,3 +2,10 @@
 
 [How To Run Multiple Docker Containers Under One URL](https://codingwithmanny.medium.com/create-an-nginx-reverse-proxy-with-docker-a1c0aa9078f1)
 
+## Backend only
+
+How to test it:
+
+1. Comment all other containers
+2. Run `docker compose build` & `docker compose up`
+3. Test by `curl localhost:5000`, should return `{"version":"1.0.0"}`
\ No newline at end of file
diff --git a/eg3/backend/docker-compose.yaml b/eg3/backend/docker-compose.yaml
deleted file mode 100644
index 43eae2c..0000000
--- a/eg3/backend/docker-compose.yaml
+++ /dev/null
@@ -1,8 +0,0 @@
-version: '3.8'
-
-services:
-  backend:
-    container_name: backend
-    build: .
-    ports:
-      - "5000:5000"
\ No newline at end of file
diff --git a/eg3/docker-compose.yaml b/eg3/docker-compose.yaml
new file mode 100644
index 0000000..18bfb41
--- /dev/null
+++ b/eg3/docker-compose.yaml
@@ -0,0 +1,27 @@
+version: '3.8'
+
+services:
+  # proxy:
+  #   container_name: proxy
+  #   build:
+  #     context: ./proxy
+  #     dockerfile: Dockerfile
+  #   ports:
+  #     - "80:80"
+  #   depends_on:
+  #     - frontend
+  #     - backend
+
+  # frontend:
+  #   container_name: frontend
+  #   build: 
+  #     context: ./frontend
+  #     dockerfile: Dockerfile
+
+  backend:
+    container_name: backend
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    ports:
+      - "5000:5000" # Uncomment this line if you want to run the backend container only
\ No newline at end of file
diff --git a/eg3/frontend/docker-compose.yaml b/eg3/frontend/docker-compose.yaml
deleted file mode 100644
index ace46c8..0000000
--- a/eg3/frontend/docker-compose.yaml
+++ /dev/null
@@ -1,8 +0,0 @@
-version: '3.8'
-
-services:
-  frontend:
-    container_name: frontend
-    build: .
-    # ports:
-    #   - "80:80"
\ No newline at end of file
diff --git a/eg3/proxy/Dockerfile b/eg3/proxy/Dockerfile
index 57f5b46..439317a 100644
--- a/eg3/proxy/Dockerfile
+++ b/eg3/proxy/Dockerfile
@@ -1,4 +1,9 @@
 FROM nginx:stable-alpine
-WORKDIR /etc/nginx/conf.d
-COPY default.conf .
-CMD [ "nginx", "-s", "reload"]
\ No newline at end of file
+COPY default.conf /etc/nginx/conf.d
+
+EXPOSE 80/tcp
+EXPOSE 443/tcp
+
+CMD [ "/bin/sh", "-c", "exec nginx -g 'daemon off;';"]
+
+WORKDIR /usr/share/nginx/html
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diff --git a/eg3/proxy/default.conf b/eg3/proxy/default.conf
index 576e8d0..8fef030 100644
--- a/eg3/proxy/default.conf
+++ b/eg3/proxy/default.conf
@@ -1,6 +1,5 @@
 server {
     listen       80;
-    listen  [::]:80;
     server_name  localhost;
 
     location / {
diff --git a/eg3/proxy/docker-compose.yaml b/eg3/proxy/docker-compose.yaml
deleted file mode 100644
index acd2a34..0000000
--- a/eg3/proxy/docker-compose.yaml
+++ /dev/null
@@ -1,8 +0,0 @@
-version: '3.8'
-
-services:
-  proxy:
-    container_name: proxy
-    build: .
-    ports:
-      - "80:80"
\ No newline at end of file