Move CI configuration to .woodpecker directory

.woodpecker.yml

@@ -1,6 +0,0 @@
-pipeline:
-  test:
-    image: androidsdk/android-30
-    commands:
-      - pwd #bump
-      - ./gradlew assembleDebug --stacktrace

.woodpecker/can_master_build.yml

@@ -0,0 +1,13 @@
+pipeline:
+  build:
+    image: androidsdk/android-30
+    commands:
+      - pwd #bump
+      - ./gradlew assembleDebug --stacktrace
+
+#this doesn't work yet:
+#https://github.com/woodpecker-ci/woodpecker/issues/687
+#when:
+  #repo: Freeyourgadget/Gadgetbridge
+  #branch: master
+