PSD sliced to html and images folder then Dreamweaver open html or images folder

Use Photoshop to create design comps to show the client.  But HTML code generated by graphics apps is not fit for actual production use. 

PHOTOSHOP:

1. Create web optimized images in Photoshop and export them  in 1x, 2x, 3x sizes with File > Export > Export As panel.  

2. Save assets to your DW local site folder.  For example, C:\myWebSite\

DREAMWEAVER:

3. Create a responsive layout with one of the pre-built Bootstrap Starter Templates.

Go to File > New > Starter Templates > Bootstrap Templates. 

Select a layout and hit CREATE button.

4. Save newly created page as index.html (your domain's home page).

5. Add your own text and insert web images with <picture> element and SRCSET attributes  for small, medium and large  devices.

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/picture

6. Save web page with Ctrl + S & upload to your server or preview in local browser.

Hope that helps.

That's sounds like a workflow used 20 years ago, exporting html from photoshop. That all stopped when responsive websites appeared. These days you would slice/export only the images you need for your website and then use html to rebuild what you designed in photoshop.........so more in keeping with your second thoughts.

Not sure why you would want to slice images. In any case, do not use the HTML created by photoshop.

Save the image from PS into the images folder and follow the instruction from the following link.

https://developer.mozilla.org/en-US/docs/Learn/HTML/Multimedia_and_embedding/Images_in_HTML