Add CI

.github/workflows/valgrind.yml

@@ -0,0 +1,20 @@
+name: Check memory leaks
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Install dependency
+      run: |
+        sudo apt-get -y install cmake valgrind
+    - name: Build
+      run: bash ci/build-and-install.sh
+    - name: Test
+      run: bash ci/test-memory.sh

ci/test-memory.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+BINARY="./build/src/md2html"
+TESTS_FILE_DIR="./tests"
+
+failed=0
+
+for md in "$TESTS_FILE_DIR"/*; do
+	valgrind --leak-check=full --error-exitcode=1 $BINARY -i $md
+	if [ $? -eq 1 ]; then
+		failed=1
+	fi
+done
+
+if [ $failed -eq 1 ]; then
+	exit 1
+else
+	exit 0
+fi