diff --git a/docs/curl to add container to pod.md b/docs/curl to add container to pod.md
index 975f455..b20f6b9 100644
--- a/docs/curl to add container to pod.md	
+++ b/docs/curl to add container to pod.md	
@@ -1,31 +1,23 @@
-PODID=""
+PODID=7e0604d0-c228-4a8c-8bb7-27eaa8c96c1e
 
 curl -X POST http://192.168.64.2:5000/api/workloads/containers \
   -H "Content-Type: application/json" \
-  -d '{
-    "pod": "$PODID",
-    "containers": [
-      {
-        "docker_image": "joke_container",
-        "container_name": "very-important-webserver",
-        "ports": [
-          {
-            "internal": 8080,
-            "external": 8765,
-            "use_dns": false
-          }
-        ]
-      },
-      {
-        "docker_image": "whoami81",
-        "container_name": "whoami-server",
-        "ports": [
-          {
-            "internal": 81,
-            "external": 8081,
-            "use_dns": false
-          }
-        ]
-      }
-    ]
-  }'
+  -d @- <<EOF
+{
+  "pod": "${PODID}",
+  "containers": [
+    {
+      "docker_image": "joke_container",
+      "container_name": "amazing-joke-server99",
+      "ports": [
+        {
+          "internal": 9092,
+          "external": 8766,
+          "use_dns": false
+        }
+      ],
+      "env": { "PORT": "9092" }
+    }
+  ]
+}
+EOF
diff --git a/docs/curl to launch containers.md b/docs/curl to launch containers.md
index cf12d23..1aef902 100644
--- a/docs/curl to launch containers.md	
+++ b/docs/curl to launch containers.md	
@@ -1,6 +1,4 @@
-curl -X POST http://192.168.64.2:5000/api/workloads/containers \
-  -H "Content-Type: application/json" \
-  -d '{
+curl -X POST http://192.168.64.2:5000/api/workloads/containers   -H "Content-Type: application/json"   -d '{
     "virtual_data_center": "b1d09477-742b-485e-87c3-5dad36dd4f9e",
     "containers": [
       {
@@ -8,11 +6,12 @@ curl -X POST http://192.168.64.2:5000/api/workloads/containers \
         "container_name": "very-important-webserver",
         "ports": [
           {
-            "internal": 8080,
-            "external": 8765,
+            "internal": 9090,
+            "external": 9090,
             "use_dns": false
           }
-        ]
+        ],
+        "env": { "PORT": "9090" }
       },
       {
         "docker_image": "whoami81",
diff --git a/sandbox/containers/joke_container/Dockerfile b/sandbox/containers/joke_container/Dockerfile
index 076aa1b..49e0afe 100644
--- a/sandbox/containers/joke_container/Dockerfile
+++ b/sandbox/containers/joke_container/Dockerfile
@@ -5,6 +5,4 @@ WORKDIR /app
 COPY jokes.py .
 COPY index.html .
 
-EXPOSE 8080
-
 CMD ["python", "jokes.py"]
diff --git a/sandbox/containers/joke_container/index.html b/sandbox/containers/joke_container/index.html
index 5d85f2b..02078fc 100644
--- a/sandbox/containers/joke_container/index.html
+++ b/sandbox/containers/joke_container/index.html
@@ -39,8 +39,9 @@
 
 <div class="container">
     <div class="box" id="static-joke">{{joke}}</div>
-    <div class="box" id="api-joke">Loading joke from API...</div>
-    <div class="box" id="public-ip">Fetching public IP...</div>
+    <div class="box" id="api-joke">Loading joke from API…</div>
+    <div class="box" id="public-ip">Fetching public IP…</div>
+    <div class="box" id="server-port">Fetching server port…</div>
 </div>
 
 <script>
@@ -53,6 +54,7 @@
     const fontSize = 16;
     const columns = canvas.width / fontSize;
     const drops = Array(Math.floor(columns)).fill(1);
+
     function drawMatrix() {
         ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
         ctx.fillRect(0, 0, canvas.width, canvas.height);
@@ -69,7 +71,17 @@
     }
     setInterval(drawMatrix, 33);
 
-    // Fetch API joke
+    // Show server port
+    fetch(window.location.href, {method: 'HEAD'})
+      .then(r => {
+          document.getElementById('server-port').textContent =
+              'Server port: {{PORTNUMBER}}';
+      })
+      .catch(() => {
+          document.getElementById('server-port').textContent = 'Server port: unknown';
+      });
+
+    // Fetch random dad joke
     fetch("https://icanhazdadjoke.com/", {
         headers: { "Accept": "application/json" }
     })
@@ -94,4 +106,4 @@
     });
 </script>
 </body>
-</html>
+</html>
\ No newline at end of file
diff --git a/sandbox/containers/joke_container/jokes.py b/sandbox/containers/joke_container/jokes.py
index 34cf8cd..9af372e 100644
--- a/sandbox/containers/joke_container/jokes.py
+++ b/sandbox/containers/joke_container/jokes.py
@@ -1,8 +1,9 @@
 import http.server
 import socketserver
 import random
+import os
 
-PORT = 8080
+PORT = int(os.getenv("PORT", 8080))
 
 JOKES = [
     "Why do programmers prefer dark mode? Because light attracts bugs!",
@@ -60,17 +61,27 @@ JOKES = [
 class JokeHandler(http.server.SimpleHTTPRequestHandler):
     def do_GET(self):
         if self.path == "/" or self.path == "/index.html":
+            try:
+                with open("index.html", "r") as f:
+                    html = f.read()
+            except FileNotFoundError:
+                self.send_error(404, "index.html not found")
+                return
+
             self.send_response(200)
             self.send_header("Content-type", "text/html")
             self.end_headers()
-            with open("index.html", "r") as file:
-                html = file.read()
+
             joke = random.choice(JOKES)
             html = html.replace("{{joke}}", joke)
+            html = html.replace("{{PORTNUMBER}}", str(PORT))
             self.wfile.write(html.encode("utf-8"))
         else:
             self.send_error(404, "File not found")
 
-with socketserver.TCPServer(("", PORT), JokeHandler) as httpd:
+if __name__ == "__main__":
+    if os.getenv("PORT"):
+        print(f"Port taken from environment: PORT={PORT}")
     print(f"Serving at http://0.0.0.0:{PORT}")
-    httpd.serve_forever()
+    with socketserver.TCPServer(("", PORT), JokeHandler) as httpd:
+        httpd.serve_forever()
\ No newline at end of file
diff --git a/websocket_server/main.py b/websocket_server/main.py
index 3254c7a..ecdbe9a 100644
--- a/websocket_server/main.py
+++ b/websocket_server/main.py
@@ -18,7 +18,7 @@ base.socketio = SocketIO(
     app,
     cors_allowed_origins="*",
     ping_timeout=5,
-    ping_interval=2
+    ping_interval=30
 )
 
 # Import all socket event handlers