Add basic server image

basic_server/Dockerfile

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+FROM python:3-slim
+COPY server.py /server.py
+EXPOSE 80
+CMD ["python3", "/server.py"]

basic_server/build.sh

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+#!/bin/sh
+sudo docker build -t pierre42100/gns3-appliance-basic-server .

basic_server/server.py

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+from http.server import BaseHTTPRequestHandler, HTTPServer
+
+PORT = 80
+
+print(f"Will listen on port {PORT}")
+
+class handler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        self.send_response(200)
+        self.send_header('Content-type','text/html')
+        self.end_headers()
+
+        message = "Hello, World! Here is simple HTTP response..."
+        self.wfile.write(bytes(message, "utf8"))
+
+with HTTPServer(('', PORT), handler) as server:
+    server.serve_forever()