some basics for the good bois

basics/Dockerfile

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+# Dokumenation: https://docs.docker.com/reference/dockerfile/
+
+# FROM debian:trixie-slim
+FROM archlinux:latest
+
+WORKDIR /root/app
+
+COPY ./test.sh .
+
+RUN chmod +x test.sh
+
+ENTRYPOINT ["/bin/bash", "-c", "/root/app/test.sh"]

basics/build.sh

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+#!/bin/bash
+
+# ─< Check if the given command exists silently >─────────────────────────────────────────
+command_exists() {
+  command -v "$@" >/dev/null 2>&1
+}
+
+NAME="testimage"
+TAG="latest"
+
+if command_exists docker; then
+  if [ -e Dockerfile ]; then
+    docker build -t "${NAME}:${TAG}" .
+  fi
+fi

basics/compose.yml

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+services:
+  app:
+    build: .

basics/test.sh

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+#!/bin/bash
+
+echo "Hallo von Docker"
+cat /etc/os-release