sp-dev-fx-webparts/samples/react-provision-assets/sharepoint/assets/elements.xml

<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
    <!-- List of possible elements expected: 
        'CustomAction, ClientWebPart, ClientSideComponent, 
        Field, ContentType, ListInstance, Module, PropertyBag' 
    -->

    <!-- Upload Site Page with SPFx webpart -->
    <Module Name="WebPartSitePage" Url="SitePages">
        <File Path="WebPartSitePage.aspx" Url="WebPartSitePage.aspx" Type="GhostableInLibrary" >
        </File>
    </Module>

    <!-- SPFxDescription Site Column -->
    <Field ID="{0ad9d45c-b110-4635-b149-2890aa3a2513}" 
           Name="SPFxDescription" 
           DisplayName="Description" 
           StaticName="SPFxDescription" 
           Group="SPFx Site Columns" 
           Type="Note" 
           Required="FALSE" 
           EnforceUniqueValues="FALSE" 
           Indexed="FALSE" 
           NumLines="8" 
           RichText="TRUE" 
           RichTextMode="FullHtml" 
           IsolateStyles="TRUE" 
           Sortable="FALSE" 
           />
    
    <!-- SPFxImage Site Column -->
    <Field ID="{f4e5dd71-448f-40e2-b991-35874a0d7fd6}" 
           Name="SPFxImage" 
           DisplayName="Image" 
           StaticName="SPFxImage" 
           Group="SPFx Site Columns" 
           Type="URL" 
           Required="FALSE" 
           EnforceUniqueValues="FALSE" 
           Indexed="FALSE" 
           Format="Hyperlink" 
        />

    <!-- Parent ContentType: Item (0x0100) -->
    <ContentType ID="0x0100CEADAD40C6630B489BDF172555628DA0"
                 Name="SPFxItem" 
                 Group="SPFx Content Types"
                 Description=""
                 Inherits="FALSE"
                 Version="0"
                 Hidden="FALSE"
                 Sealed="FALSE"
                 >
        <FieldRefs>
            <!-- SPFxDescription Site Column -->
            <FieldRef ID="{f4e5dd71-448f-40e2-b991-35874a0d7fd6}" Required="FALSE" ShowInNewForm="TRUE" ShowInEditForm="TRUE" />
            <!-- SPFxImage Site Column -->
            <FieldRef ID="{0ad9d45c-b110-4635-b149-2890aa3a2513}" Required="FALSE" ShowInNewForm="TRUE" ShowInEditForm="TRUE" />
        </FieldRefs>
    </ContentType> 

    <!-- Parent ContentType: Document (0x0101) -->
    <ContentType ID="0x0101A33D9AD9805788419BDAAC2CCB37500F"
                Name="SPFxDocument" 
                Group="SPFx Content Types" 
                Description=""
                Inherits="FALSE"
                Version="0"
                Hidden="FALSE"
                Sealed="FALSE"
                >
        <FieldRefs>
            <!-- SPFxDescription Site Column -->
            <FieldRef ID="{f4e5dd71-448f-40e2-b991-35874a0d7fd6}" Required="FALSE" ShowInNewForm="TRUE" ShowInEditForm="TRUE" />
            <!-- SPFxImage Site Column -->
            <FieldRef ID="{0ad9d45c-b110-4635-b149-2890aa3a2513}" Required="FALSE" ShowInNewForm="TRUE" ShowInEditForm="TRUE" />
        </FieldRefs>
        <DocumentTemplate TargetName="/_layouts/15/upload.aspx"/>
    </ContentType> 

    <!-- List (TemplateType 100) -->
    <ListInstance 
            CustomSchema="listSchema.xml"
            FeatureId="00bfea71-de22-43b2-a848-c05709900100"
            Title="SPFx List" 
            Description=""
            TemplateType="100"
            Url="Lists/SPFxList"
            Hidden="FALSE">
            <!-- Add default data with the list -->
            <!-- Note: Deactivating and activating the feature will 
            duplicate the data, so remove or comment if no initial data needed
            -->
            <Data>
                <Rows>
                    <Row>
                        <Field Name="Title">Title 1</Field>
                        <Field Name="SPFxDescription">Description 1</Field>
                        <!-- Usage of Special Tokens (~site and ~sitecollection)
                        Source: https://dev.office.com/sharepoint/docs/general-development/urls-and-tokens-in-sharepoint -->
                        <Field Name="SPFxImage">~site/SitePages/Forms/ByAuthor.aspx, URL Title1</Field>
                    </Row>
                    <Row>
                        <Field Name="Title">Title 2</Field>
                        <Field Name="SPFxDescription">Description 2</Field>
                        <!-- Usage of Special Tokens (~site and ~sitecollection)
                        Source: https://dev.office.com/sharepoint/docs/general-development/urls-and-tokens-in-sharepoint -->
                        <Field Name="SPFxImage">~site/SitePages/Forms/ByAuthor.aspx, URL Title2</Field>
                    </Row>
                </Rows>
            </Data>
    </ListInstance>

    <!-- Document Library (TemplateType 101) -->
    <ListInstance 
            CustomSchema="librarySchema.xml"
            FeatureId="00bfea71-e717-4e80-aa17-d0c71b360101"
            Title="SPFx Document Library" 
            Description=""
            TemplateType="101"
            Url="SPFxDocumentLibrary"
            Hidden="FALSE">
    </ListInstance>
    
    <!-- Upload files to the SPFxDocumentLibrary -->
    <Module Name="Files" Url="SPFxDocumentLibrary">
        <!-- ISSUE: For some reason `gulp package-solution` breaks the .jpg, .png images. 
         Workaround is to open the .sppkg with winrar and add the images manually. -->
        <File Path="Image1.jpg" Url="Image1.jpg" Type="GhostableInLibrary" ReplaceContent="TRUE" >
        </File>
        <File Path="Image2.png" Url="CustomFolder/Image2.png" Type="GhostableInLibrary" ReplaceContent="TRUE">
        </File>
    </Module>

    <!-- Web PropertyBag Properties -->
    <!-- PropertyBag: https://msdn.microsoft.com/en-us/library/office/gg491706.aspx -->
    <PropertyBag ParentType="Web" RootWebOnly="FALSE">
        
        <!-- Property: https://msdn.microsoft.com/en-us/library/office/gg491703.aspx -->
        <Property Name="SPFxName1" Value="SPFxValue1" Type="string"/>
        <Property Name="SPFxName2" Value="1" Type="int"/>

    </PropertyBag>

    <!-- List PropertyBag Properties -->
    <!-- PropertyBag: https://msdn.microsoft.com/en-us/library/office/gg491706.aspx -->
    <PropertyBag ParentType="Folder" RootWebOnly="FALSE" Url="Lists/SPFxList">
        
        <!-- Property: https://msdn.microsoft.com/en-us/library/office/gg491703.aspx -->
        <Property Name="SPFxListName1" Value="SPFxListValue1" Type="string"/>
        <Property Name="SPFxListName2" Value="1" Type="int"/>

    </PropertyBag>
</Elements>