Added Comment

firmware_digispark/firmware_digispark.ino

@@ -1,3 +1,24 @@
+/**
+ * Dennis Gunia (c) 2023
+ *
+ * USB Keyboard for Worship song-switching
+ * 
+ *
+ * Designed for Arduino Pro Micro
+ * 
+ * Use pin 0 and 2 as inputs. Connect Switches to Ground.
+ * 
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
 #include "DigiKeyboard.h"
 
 #define SW_1_PIN 0