add drone config

.drone.yml

@@ -0,0 +1,19 @@
+    kind: pipeline
+    type: docker
+    name: default
+
+    steps:
+    - name: shellcheck
+      image: python:3
+      commands:
+      - apt update && apt upgrade -y && apt install -y shellcheck
+      - pip3 install pylint bandit mccabe
+      - for file in $(find . -type f -name \"*.sh\"); do shellcheck --format=gcc $file; done;
+      - find . -name "*.py" -exec python3 -m py_compile '{}' \;
+      - find . -name "*.py" -exec pylint '{}' + || if [ $? -eq 1 ]; then echo "you fail"; fi
+      - find . -name "*.py" -exec python3 -m mccabe --min 3 '{}' + || if [ $? -eq 1 ]; then echo "you fail"; fi
+      - bandit -r .
+
+    trigger:
+      branch:
+      - master