input: Write a python function to generate an HTML string from a dictionary with 'title' and 'content' keys.
  assert generate_html({'title': 'Hello', 'content': 'World'}) == '<div class="container"><h1 class="title">Hello</h1><p class="content">World</p></div>'
  assert generate_html({'title': 'Test', 'content': 'This is a test'}) == '<div class="container"><h1 class="title">Test</h1><p class="content">This is a test</p></div>'
  assert generate_html({'title': 'Sample', 'content': 'Sample content'}) == '<div class="container"><h1 class="title">Sample</h1><p class="content">Sample content</p></div>'
output: def generate_html(data):
      return f'<div class="container"><h1 class="title">{data["title"]}</h1><p class="content">{data["content"]}</p></div>'