Add GitHub Actions workflow to publish packages

.github/workflows/aur/Dockerfile

@@ -0,0 +1,31 @@
+FROM archlinux/base
+ENV LC_ALL=C
+ARG AUR_SSH_KEY
+ARG GIT_EMAIL
+ARG GIT_NAME
+ARG aiogram_ver
+ENV AIOGRAM_VERSION=${aiogram_ver}
+
+RUN mkdir -p /etc/sudoers.d \
+    && echo "makepkg ALL=(ALL) NOPASSWD: ALL" >/etc/sudoers.d/01_makepkg \
+    && useradd -d /var/build -g users -mNrs /bin/bash makepkg
+
+COPY entrypoint.sh /entrypoint.sh
+
+RUN chmod +x /entrypoint.sh \
+    && pacman -Syu base-devel pacman-contrib git openssh --noconfirm --needed \
+    && rm -rf /var/cache/pacman/pkg/*
+
+WORKDIR /var/build
+USER makepkg
+
+RUN mkdir /var/build/.ssh \
+    && echo "${AUR_SSH_KEY}" >/var/build/.ssh/id_rsa \
+    && chmod 400 /var/build/.ssh/id_rsa \
+    && echo "aur.archlinux.org,5.9.250.164 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBOZAVWmj2k+dHTfyum7FyIivGcVUkDFHaXmPNxDwF7l8TvkAN8VDQJHEEGJhALMYtNsQ+kt0gksSh4HZqj9n5hI=" >/var/build/.ssh/known_hosts \
+    && git config --global user.email ${GIT_EMAIL} \
+    && git config --global user.name "${GIT_NAME}"
+
+COPY --chown=makepkg:users PKGBUILD ./PKGBUILD
+
+ENTRYPOINT ["/entrypoint.sh"]