Dont update images that aren't being started (#5)

Co-authored-by: James Otting <[email protected]>

update.go

@@ -141,7 +141,9 @@ func checkUpdate(curProfile *Profile, all, force bool) error {
 	}
 	// add current profile's image
 	for _, i := range checkImageDate(curProfile, checkData, force) {
-		imagesMap[i] = true
+		if all || i.Platform == "linux/"+curProfile.Arch {
+			imagesMap[i] = true
+		}
 	}
 
 	if all {
@@ -189,7 +191,7 @@ func checkImageDate(profile *Profile, checkData ImageCheckData, force bool) []Im
 		imageCandidates = append(imageCandidates, ImageDef{Image: profile.ImageAMD64, Platform: "linux/amd64"})
 		imageCandidates = append(imageCandidates, ImageDef{Image: profile.ImageARM64, Platform: "linux/arm64"})
 	case profile.Image != "":
-		imageCandidates = append(imageCandidates, ImageDef{Image: profile.Image, Platform: profile.Arch})
+		imageCandidates = append(imageCandidates, ImageDef{Image: profile.Image, Platform: "linux/" + profile.Arch})
 	default:
 		return images
 	}