test: add integration tests

.github/actions/build-test-push/push.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+# Exit early.
+# See: https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#The-Set-Builtin.
+set -e
+
+# Source dot env file.
+source .env
+
+# Arguments.
+tags=""
+dry_run=""
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    --tags)
+      tags="$2"
+      shift 2
+      ;;
+    --dry-run)
+      dry_run=$2
+      shift 2
+      ;;
+    *)
+      echo "Unknown option $1"
+      exit 1
+      ;;
+  esac
+done
+
+echo "Push tag(s) 📦"
+echo
+
+echo "Tag(s) to push:"
+IFS=',' read -ra tags_to_push <<< "$tags"
+for tag in "${tags_to_push[@]}"; do
+  echo "- $tag"
+done
+
+if [ "$dry_run" = "true" ]; then
+  echo "🚧 Dry run"
+fi
+echo
+
+# Push tags.
+run_cmd() {
+  local cmd="$1"
+
+  if [ "$dry_run" = "true" ]; then
+    echo "🚧 Dry run - would run the following command:"
+    echo "$cmd"
+    echo
+  else
+    echo "⚙️ Running command:"
+    echo "$cmd"
+    eval "$cmd"
+    echo
+  fi
+}
+
+for tag in "${tags_to_push[@]}"; do
+  cmd="docker push $tag"
+  run_cmd "$cmd"
+
+  echo "➡️ $tag pushed"
+  echo
+done
+
+echo "✅ Done!"
+exit 0