diff --git a/deployment-service/dockerfile b/deployment-service/dockerfile
index efd442f..22aa1d8 100644
--- a/deployment-service/dockerfile
+++ b/deployment-service/dockerfile
@@ -7,5 +7,7 @@ RUN npm ci --only=production
 COPY src ./src
 COPY snakeapi_service ./snakeapi_service
 
+ENV FLY_ACCESS_TOKEN="FlyV1 fm2_lJPECAAAAAAACJJHxBByW6wRXXxQ17OD8xlRRR5cwrVodHRwczovL2FwaS5mbHkuaW8vdjGUAJLOAA//nh8Lk7lodHRwczovL2FwaS5mbHkuaW8vYWFhL3YxxDwQBQg0Vif1OLMYOJOtNVokX+9SIVL2E8QoNub0JDBE4wNh97aUAPiiNvpAAMhM/eO7SWUVAx5rcDTBjf7ETtdnvXtcHaqOnK2HmNSV9K9UVy5Or3Sd+0+kxqDoWRXGE0y5pdb8+HNqwMcryszYvAv8HVcoKFgF4qd7GmzniNvZETOkrbsjMsU1+mVXTMQgh7H9z6IcGVjJozV92cDsSn91USqxOmBdwFQAkFGwPV0=,fm2_lJPETtdnvXtcHaqOnK2HmNSV9K9UVy5Or3Sd+0+kxqDoWRXGE0y5pdb8+HNqwMcryszYvAv8HVcoKFgF4qd7GmzniNvZETOkrbsjMsU1+mVXTMQQqnJP464DwxC6D4e3p9THZMO5aHR0cHM6Ly9hcGkuZmx5LmlvL2FhYS92MZgEks5oESI9zwAAAAEkCUBbF84AD2FZCpHOAA9hWQzEEL6gO8olFxMOq1uFxP1yJavEIBDKb7RuqVr/sFQniKl0S2HMM6+AQJH3940ly0mufbYx"
+
 EXPOSE 3006
 CMD ["node", "src/index.js"]
diff --git a/deployment-service/fly.toml b/deployment-service/fly.toml
index 7938a3b..6c0c77d 100644
--- a/deployment-service/fly.toml
+++ b/deployment-service/fly.toml
@@ -5,10 +5,12 @@ primary_region = 'sea'
 dockerfile = "Dockerfile"
 
 [env]
-  FLY_ORG = "personal"
-  COMMON_BUCKET = "snakeapi-deployment-test-bucket"
-  AWS_ENDPOINT_URL_S3 = "https://fly.storage.tigris.dev"
-  AWS_REGION = "auto"
+  FLY_ORG="personal"
+  COMMON_BUCKET="snakeapi-deployment-test-bucket"
+  AWS_ACCESS_KEY_ID="tid__NSmOVaGknqitaCySppZjqVTgJSdDFnFbWcQllkC_juHwkbQZO"
+  AWS_SECRET_ACCESS_KEY="tsec_6Bz1aMbfYQftuq5WfIVEDZkHwskU4MMjVywdtxSP6uxetEBvkSC2VHI9HfTeDgHr4D6kiz"
+  AWS_ENDPOINT_URL_S3="https://fly.storage.tigris.dev"
+  AWS_REGION="auto"
 
 [http_service]
 internal_port = 3006
diff --git a/deployment-service/snakeapi_service/dockerfile b/deployment-service/snakeapi_service/dockerfile
index 80c866a..8095003 100644
--- a/deployment-service/snakeapi_service/dockerfile
+++ b/deployment-service/snakeapi_service/dockerfile
@@ -4,7 +4,7 @@ WORKDIR /app
 RUN pip install --no-cache-dir jupyter flask awscli flask_cors nbconvert nbformat
 
 COPY entrypoint.sh .
-COPY notebook.ipynb .
+COPY notebooks ./notebooks
 
 RUN chmod +x entrypoint.sh
 
diff --git a/deployment-service/snakeapi_service/entrypoint.sh b/deployment-service/snakeapi_service/entrypoint.sh
index 6f48c9b..0b5fea6 100644
--- a/deployment-service/snakeapi_service/entrypoint.sh
+++ b/deployment-service/snakeapi_service/entrypoint.sh
@@ -15,7 +15,6 @@ while true; do
   if [ "$new_mod" -ne "$last_mod" ]; then
     last_mod=$new_mod
     jupyter nbconvert --to notebook --execute --inplace --ExecutePreprocessor.timeout=0 notebook.ipynb
-    echo "Notebook executed; restarting..."
   fi
 
   sleep 1
diff --git a/deployment-service/snakeapi_service/fly.toml b/deployment-service/snakeapi_service/fly.toml
index 47bb81d..0a473f9 100644
--- a/deployment-service/snakeapi_service/fly.toml
+++ b/deployment-service/snakeapi_service/fly.toml
@@ -6,7 +6,7 @@ kill_timeout = 5
 dockerfile = "Dockerfile"
 
 [env]
-  PORT = "3006"
+PORT = "3006"
 
 [[services]]
 internal_port = 3006
diff --git a/deployment-service/snakeapi_service/notebook.ipynb b/deployment-service/snakeapi_service/notebooks/notebook.ipynb
similarity index 100%
rename from deployment-service/snakeapi_service/notebook.ipynb
rename to deployment-service/snakeapi_service/notebooks/notebook.ipynb
diff --git a/deployment-service/src/index.js b/deployment-service/src/index.js
index 5e08139..1402747 100644
--- a/deployment-service/src/index.js
+++ b/deployment-service/src/index.js
@@ -3,6 +3,7 @@ const fs = require('fs');
 const path = require('path');
 const AWS = require('aws-sdk');
 const axios = require('axios');
+const tar = require('tar');
 
 const {
   FLY_ORG,
@@ -32,15 +33,23 @@ function createFlyClient() {
 }
 
 const app = express();
-app.use(express.json());
+app.use(express.json({ limit: '10mb' }));
 
 app.post('/deploy', async (req, res) => {
   const { appName, region = 'sea', notebookName } = req.body;
-  if (!appName || !notebookName) return res.status(400).json({ error: 'appName and notebookName are required.' });
+  if (!appName || !notebookName) {
+    return res.status(400).json({ error: 'appName and notebookName required' });
+  }
 
   try {
     const fly = createFlyClient();
-    await fly.post('/apps', { name: appName, org_slug: FLY_ORG, primary_region: region });
+
+    await fly.post('/apps', {
+      name: appName,
+      org_slug: FLY_ORG,
+      primary_region: region
+    });
+
     await fly.post(`/apps/${appName}/secrets`, {
       secrets: {
         INSTANCE_PREFIX: appName,
@@ -52,18 +61,83 @@ app.post('/deploy', async (req, res) => {
       }
     });
 
-    const tpl = fs.readFileSync(path.join(__dirname, '../snakeapi_service', notebookName));
+    const notebookFile = path.join(__dirname, '../snakeapi_service/notebooks', notebookName);
+    const notebookData = fs.readFileSync(notebookFile);
     await s3.putObject({
       Bucket: COMMON_BUCKET,
-      Key: `${appName}/${notebookName}`,
-      Body: tpl,
+      Key: `${appName}/notebook.ipynb`,
+      Body: notebookData,
       ContentType: 'application/json'
     }).promise();
 
-    await fly.post(`/apps/${appName}/deploys`);
-    res.json({ status: 'created', app: appName, url: `https://${appName}.fly.dev` });
+    const tarFilePath = `/tmp/${appName}.tar.gz`;
+    await tar.c(
+      {
+        gzip: true,
+        file: tarFilePath,
+        cwd: path.join(__dirname, '../snakeapi_service')
+      },
+      ['.']
+    );
+
+    const tarData = fs.readFileSync(tarFilePath);
+    await fly.post(`/apps/${appName}/deploys`, tarData, {
+      headers: { 'Content-Type': 'application/gzip' }
+    });
+
+    res.json({
+      status: 'created',
+      app: appName,
+      url: `https://${appName}.fly.dev`
+    });
+  } catch (error) {
+    res.status(500).json({ error: error.response?.data || error.message });
+  }
+});
+
+app.post('/upload/:appName', async (req, res) => {
+  const { appName } = req.params;
+  const notebookContent = req.body;
+
+  if (!notebookContent) {
+    return res.status(400).json({ error: 'Notebook content required.' });
+  }
+
+  try {
+    const notebookBuffer = Buffer.from(JSON.stringify(notebookContent));
+    await s3.putObject({
+      Bucket: COMMON_BUCKET,
+      Key: `${appName}/notebook.ipynb`,
+      Body: notebookBuffer,
+      ContentType: 'application/json'
+    }).promise();
+
+    const fly = createFlyClient();
+
+    const tempNotebookPath = path.join(__dirname, '../snakeapi_service/notebooks/notebook.ipynb');
+    fs.writeFileSync(tempNotebookPath, notebookBuffer);
+
+    const tarFilePath = `/tmp/${appName}-redeploy.tar.gz`;
+    await tar.c(
+      {
+        gzip: true,
+        file: tarFilePath,
+        cwd: path.join(__dirname, '../snakeapi_service')
+      },
+      ['.']
+    );
+
+    const tarData = fs.readFileSync(tarFilePath);
+    await fly.post(`/apps/${appName}/deploys`, tarData, {
+      headers: { 'Content-Type': 'application/gzip' }
+    });
+
+    res.json({
+      status: 'updated',
+      app: appName,
+      message: 'Notebook updated and application redeployed.'
+    });
   } catch (error) {
-    console.error('Deploy endpoint failed:', error);
     res.status(500).json({ error: error.response?.data || error.message });
   }
 });