Update Dockerfile

Dockerfile

@@ -1,3 +1,4 @@
+# syntax=docker/dockerfile:1
 FROM ubuntu:22.04
 
 ENV DEBIAN_FRONTEND=noninteractive
@@ -33,7 +34,8 @@ RUN pip3 install fastapi uvicorn pydantic
 RUN mkdir -p /opt/api /workspace /var/log/supervisor
 
 # ---- 1. Create the Python API (FastAPI) ----
-RUN /bin/bash -c "cat << 'EOF' > /opt/api/api.py
+# Using COPY <<"EOF" cleanly writes the file without escaping issues
+COPY <<"EOF" /opt/api/api.py
 from fastapi import FastAPI, HTTPException
 from pydantic import BaseModel
 import os, subprocess, shutil
@@ -93,10 +95,10 @@ def delete_item(req: DeleteRequest):
         return {'status': 'success'}
     except Exception as e:
         raise HTTPException(status_code=400, detail=str(e))
-EOF"
+EOF
 
 # ---- 2. Create Nginx Configuration ----
-RUN /bin/bash -c "cat << 'EOF' > /etc/nginx/nginx.conf
+COPY <<"EOF" /etc/nginx/nginx.conf
 events {}
 http {
     server {
@@ -104,25 +106,25 @@ http {
         
         # Route API requests to Python server
         location /api/ {
-            proxy_pass http://127.0.0.1:8000/api/;
-            proxy_set_header Host \$host;
-            proxy_set_header X-Real-IP \$remote_addr;
+            proxy_pass http://127.0.0.1:8000;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
         }
 
         # Route all other requests to code-server
         location / {
             proxy_pass http://127.0.0.1:8080/;
-            proxy_set_header Host \$host;
-            proxy_set_header Upgrade \$http_upgrade;
+            proxy_set_header Host $host;
+            proxy_set_header Upgrade $http_upgrade;
             proxy_set_header Connection upgrade;
             proxy_set_header Accept-Encoding gzip;
         }
     }
 }
-EOF"
+EOF
 
 # ---- 3. Create Supervisor Configuration ----
-RUN /bin/bash -c "cat << 'EOF' > /etc/supervisor/conf.d/supervisord.conf
+COPY <<"EOF" /etc/supervisor/conf.d/supervisord.conf
 [supervisord]
 nodaemon=true
 
@@ -137,14 +139,14 @@ directory=/opt/api
 autorestart=true
 
 [program:nginx]
-command=nginx -g 'daemon off;'
+command=nginx -g "daemon off;"
 autorestart=true
-EOF"
+EOF
 
 # ---- Workspace Setup ----
 WORKDIR /workspace
 
 EXPOSE 7860
 
-# Start Supervisor (which starts code-server, api, and nginx)
+# Start Supervisor (which automatically handles code-server, api, and nginx)
 CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]