How to upload the image in storage from flask - forms

Question

i have stored these form field in firestore and i need to store the image file to Storage but i have been getting error. i need to save the image to storage from the HTML code. here is the html code below,
if request.method == "POST":
client_id = request.form["clientId"]
first_name = request.form["firstName"]
last_name = request.form["lastName"]
image = request.files["image"]
client = {
"clientId": client_id,
"firstName": first_name,
"lastName": last_name,
"image": image
}
try:
db.collection('clients').document(client_id).set(client)
return redirect("/addclient")
except:
return render_template("/add_client.html", message="Something went wrong")
return render_template("/add_client.html")
<form method="post" class="col-3">
<div class="mb-3">
<label for="clientId" >Client ID</label>
<input type="text" class="form-control" name="clientId"
placeholder="Client ID" required>
</div>
<div class="mb-3">
<label for="firstName" >First Name</label>
<input type="text" class="form-control" name="firstName"
placeholder="Client's First name" required>
</div>
<div class="mb-3">
<label for="lastName" >Last Name</label>
<input type="text" class="form-control" name="lastName"
placeholder="Client's Last name" >
</div>
<div class="mb-3">
<label class="image" for="image">Upload a Client's Photo</label>
<input type="file" class="form-control" name="image" accept="image/*" />
</div>
<div class="mb-3">
<button type="submit" class="btn btn-warning text-white font-weight-bold w-100 mt-2">
Register Client
</button>
</div>
</form>