Ok, thank you for explaining that!
You can definitely build what you're describing using the WebDev module. If you want to serve up static pages, just right click on the WebDev module, click New Text Resource and then name your file (e.g. index.html). Add some HTML and then save your project. To launch your resource, click on the file you just created in the Web Dev section of your designer, then go to Tools -> Launch WebDev -> Launch Resource.
On the other hand, if you wish to display dynamic content from a database in your HTML content, the best way I found to do this is to create a new Web Dev resource (right-click), then select the New Python Resource option. Name your resource something that makes sense. Then use Python to build your dynamic data, create HTML from that, then serve it up just like the Text Resource (Tools -> Launch WebDev -> Launch Resource)
Example code:
def doGet(request, session):
# untested code from memory!
ds = system.db.runNamedQuery("Asset/GetAssets")
body = ""
for item in len(ds.getRowCount()):
body.append("<p>{}: {}</p>".format(ds.getValueAt(item, "AssetID"), ds.getValueAt(item, "Name")))
html = """
<html>
<body>
<h1 style="color: aliceblue;">Asset list</h1>
""" + body + """
<body>
</html>
"""
return {'html': html}