Replace travis tests, fix hadolint error

Signed-off-by: Knut Ahlers <knut@ahlers.me>

.github/workflows/test.yml

@@ -0,0 +1,17 @@
+---
+
+name: 'Test Docker-Image'
+
+on: [push]
+
+jobs:
+  test-docker-image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Test
+        run: make test
+
+...

.travis.yml

@@ -1,5 +0,0 @@
-language: bash
-services: docker
-
-script:
-  - make test

Dockerfile

@@ -6,6 +6,8 @@ LABEL maintainer Knut Ahlers <knut@ahlers.me>
 ENV TEAMSPEAK_VERSION=3.13.7 \
     TEAMSPEAK_SHA256=775a5731a9809801e4c8f9066cd9bc562a1b368553139c1249f2a0740d50041e
 
+SHELL ["/bin/bash", "-o", "pipefail", "-exc"]
+
 RUN apt-get update \
  && apt-get install --no-install-recommends -y \
       bzip2 \