Add static analysis action

Fixes #6

Author: emphoeller

.github/workflows/static-analysis.yml

@@ -0,0 +1,22 @@
+---
+
+name: static-analysis
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  static-analysis:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - uses: actions/setup-python@v5
+      - run: pip install yamllint flake8 bandit
+      - run: yamllint .github/workflows/
+      - run: flake8 coturn_exporter
+      - run: bandit coturn_exporter
+
+...