Driver for generic camera jpg image capture & send via Pushover

OK, I showed my ignorance on multipart/form-data (in addition to not knowing pushover). Here's an idea, based on reading some more of the pushover docs as well as a Hubitat forum post. FYI @ilkeraktuna

def postBody = """----abcdefg
Content-Disposition: form-data; name="user"

$userKey
----abcdefg
Content-Disposition: form-data; name="token"

$apiKey
----abcdefg
Content-Disposition: form-data; name="message"

Pushing an image attachment
----abcdefg
Content-Disposition: form-data; name="attachment"; filename="your_image.jpg"
Content-Type: image/jpeg

$encodedImage
----abcdefg--"""
    
    // Prepare the package to be sent
    def params = [
        uri: "https://api.pushover.net/1/messages.json",
        contentType: "multipart/form-data; boundary=--abcdefg",
        body: postBody
    ]
    
    httpPost(params){response ->
        if(response.status != 200) {
            log.error "Received HTTP error ${response.status}. Check your keys!"
        }
        else {
            log.debug "Message Received by Pushover Server"
        }
    }