[BUG] post testimonials backend Fixed

[Hemu21]

Issue that this pull request solves

Issue Link resolve #1054
Closes: #1054

Brief description of what is fixed or changed

• We are using to save in image using multer. In backend the post testimonials is not used the multer. This leads to ask user to ask url from frontend. that will reduce user experience.
• along with backend update we need to update the frontend for posting and getting of the image and data.
• Need to update the image display process in frontend.

Now testimonial image saving and display is working fine.

Types of changes

Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (Documentation content changed)
• Other (please describe):

Checklist

Put an x in the boxes that apply

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• My changes does not break the current system and it passes all the current test cases.

[Hemu21]

@Kajol-Kumari can you please check and merge it.

[Kajol-Kumari]

minor comment

[Hemu21]

@Kajol-Kumari can you please tell what are the minor comments

[Hemu21]

@Kajol-Kumari This is the function we used to get data. here I made small chage if image exist. we use that url else we use default image a url.

[Hemu21]

@Kajol-Kumari I had made it as if user provide the image we use it and display it. if user doesn't provide then no need to save default. instead we can show them default in frontend. I check it is working. you can check in the preview you can see the default images.